Ryobi 18v vs SKILSAW Circular Saw

Ryobi and SKILSAW are both budget brands. This is where people come to look for top performance circular saws without necessarily spending a fortune.

Both brands have been around for over half a century. With more years under their belt for building the best saw tools, it is easy to trust them to provide us with the best tools that we need.

If you are new to circular saws, make sure that you consider the blade size, the power output, design, quality, bevel cuts, and power source before choosing a unit.

Quick Summary

Ryobi P508 circular saw comes out as a top option for those looking for the best portable circular saw. Since it is battery powered, it will be easier for you to use such a circular saw at construction sites that do not have electricity connected yet.

The SKILSAW southpaw STP67M8-01 model is a top choice for someone who wants a workhorse that remains reliable each time you have to use it. It comes with more power output and cutting speed to make it easier for you to cut through different workpieces.

The Comparison

Ryobi P508 One+ 18V Lithium Ion Cordless Circular Saw


Ryobi P508 One+ 18V Lithium Ion Cordless Brushless 7 1/4 3,800 RPM Circular Saw w/ Included Blade (Battery Not Included, Power Tool Only)


The P508 cordless circular saw is one of the latest saws from Ryobi. Being a new model, we expect that it would perform relatively better as compared to the older models it is replacing. Here are some of the features you will get with the unit.

A Brushless Motor

It seems like newer circular saws and related power tools now have a brushless motor. The reason for going brushless is because they are good in terms of power output, they can run longer without overheating, they have an increased motor life, and they are quieter.

With all these benefits, it should be the reason most people consider getting one for themselves right now.

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The Cut Size

The cutting capacity of this P508 unit is 26% more in comparison to the P507 model it replaces. This is because this model comes with a full size 7-1/4” blade. With such a size of a blade, we find that it gives the unit enough capacity to cut up to 2-7/16” depth at an angle of 0 degrees. We must point out that it is now easier to find accessories that can work with the 7-1/4” blade.



Ryobi P508 One+ 18V Lithium Ion Cordless Brushless 7 1/4 3,800 RPM Circular Saw w/ Included Blade (Battery Not Included, Power Tool Only)


Left Mount Blade

Compared to the previous generation, we see that this one also has a left side blade mount. Why would a company stick to this design? Well, Ryobi claims that this mounting design allows for you to have a better cut line visibility.

This should work well for anyone who is right-handed. Those who are left-handed might find it awkward at first, but it gets easier on the eyes with time.

The Design

Just like any other circular saw, the design can determine if someone gets to choose the unit or not. For the P508 model, we find that model has a comfortable design.

The grip feels comfortable in the hand, giving you better control over the tool while cutting through a workpiece. The front-pommel handle is also correctly positioned so that you can easily work it with two hands where necessary.

As part of the design, the unit also has an LED lighting system. Having more light is crucial for you to see the cut line better.

Bevel Cuts

The unit is also liked for offering bevel cuts. The bevel capacity runs from 0 to 56 degrees. Comparing it to some other expensive units, we find this one offering the best value for money. Setting up the angles is easier as compared to when working with other units.

What We Like

  • Impressive bevel cut options
  • It has a comfortable design
  • More power output from the motor

What We Don’t Like

  • Blade change is not the easiest

The Solution: The spindle lock can be tricky to operate at first while changing the blade. However, it is a learning curve for most people. Within a few sessions, changing your blade becomes easier.

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SKILSAW Southpaw SPT67M8-01 15 Amp Sidewinder Circular Saw

SKILSAW Southpaw SPT67M8-01 15 Amp 7-1/4 In. Magnesium Left Blade Sidewinder Circular Saw

SKILSAW products are also among the most affordable options for most users. If you hope to get the best circular saw on a budget, then the STP6M8-01 unit can be an ideal choice. Let us look at why it might be good for you to consider getting it.

Dual Field Motor

The motor of this unit has a different design as compared to other models on the market. This is because it has a dual field motor. Such a motor is designed with performance and better cooling in mind. As a result, we find that the circular saw can be used on multiple projects throughout the day without worrying much about overheating the motor.

Other than remaining cooler for longer, the motor can also run at high speeds. It is able to deliver up to 5300RPM, which is faster than the Ryobi model above.

Left-Mounted Blade

Just like the P508 model above, this one also has a left-mounted blade. The left blade view is important for increasing the visibility. As such, you will have an easier time looking at the cut line when cutting through a workpiece.

SKILSAW Southpaw SPT67M8-01 15 Amp 7-1/4 Inch Magnesium Left Blade Sidewinder Circular Saw

Multiple Cut Depth Options

To stand out as a versatile unit, we find that it comes with adjustable cut depth options. This depends on what workpiece you are cutting. The options include ¼ ply, ½ ply, ¾ ply, and 2x. The best part is that you can switch from one depth option to another in a snap.

The long 10 foot power cord is important to prevent snagging of the cord in the workpiece when making the cuts.

Bevel Cut Capacity

It seems like everyone would now want their circular saw to have the bevel cut feature. Even if it has one, what is the capacity? For this unit we find that it comes with a bevel capacity starting from 0 to 45 degrees. As a result, it is ideal for framing, ceilings, sliding, decking, and so much more. You will now have an easier time working on soft, hard, or engineered woods.


We cannot forget about the durability also. The model comes with an all-magnesium construction that should work great for you. Such a material ensures that you end up with better durability and a lightweight circular saw. Well, it might not be the lightest at 10.6 pounds, but it is good enough to enhance portability.

What We Like

  • Highly durable construction
  • The dual-field motor prevents overheating
  • It has multiple cutting depth options

What We Don’t Like

  • Slightly heavier than what most would want for portability

The Solution: As much as some would wish for a lighter model, 10.6 pounds is not too much for someone to disregard the other benefits that come with owning the circular saw.

Which is Better?

Both SKILSAW and Ryobi models in this review come with large 7-1/4” inch blades. With such blades, we find that you will have more cutting depth as compared to other units on the market. It should make your work easier when cutting large workpieces.

They also have the same orientation when it comes to mounting of blades. The blades are left mounted to help improve the visibility of the cut line. As such, you should have better accuracy when cutting with such tools.

As for the question which one is better, we have to settle on the SKILSAW unit. The model has a unique motor design that ensures there is no overheating and can keep working for longer. Also, it comes with a better cutting speed to improve productivity.

Final Thoughts

These two circular saws can be used in the same work environment considering they have multiple similar features. For the money, we find them offering the best value for money for anyone on a budget.

If you are interested mostly in portability, then the Ryobi P508 model is ideal since it is lightweight and battery powered. The SKILSAW SPT67M8 model is for those who want brute power and have an easy access to an electrical outlet.