Dewalt DCS391 vs DCS391B matchup is indeed a very close competition, as it features two almost identical models.
You may implicitly tell from the names that DCS391B is an upgrade of its counterpart. To some extent, your assumption is correct. However, there are obviously some subtle differences that will come to light through my comparison.
If you are looking to get some light woodwork projects done, you would love Dewalt DCS391. Plus, despite having the same weight, this tool is ideal for operators who love the compact design, as it takes less space.
On the flip side, DCS391B is more suitable for more demanding tasks (but not too demanding), as it features a higher motor power. The tool is also an excellent choice for those who emphasize more on the productivity aspect of their works.
It is a good practice to go over the basic information of both Dewalt circular saws before diving into their similarities and differences.
Differences Between Dewalt DCS391 vs DCS391B
This section takes you on an adventure of exploring the similarities and differences between Dewalt DCS391 vs DCS391B, based on nine criteria.
Both machines require significant efforts and visions from operators, as there are no add-in functions to support them in precise cutting. You will not have any guiding tools or LED lights to help you with accuracy.
In short, both Dewalt DCS391 and DCS391B are equivalently moderate when it comes to precision.
Design And Material
Being produced by the same company makes their structures very similar. You will notice Dewalt’s iconic black-and-yellow design in both models.
The black blend comes from the over-molding material of the comfort grip and the plastic blade cover, while the yellow parts are mainly the hard plastic of the covers.
You can also find the lightweight magnesium shoe in both models, providing operators with effortless sliding experiences during their cuts.
Another similar point in both saws’ designs is the cutting blade resting on your left-hand sides. The battery installing spot is placed at the back of the tools.
Dewalt packs all these design features in a very compact structure of only 7.1 pounds in tool weight, with no hassle cords. Thus, the machines are not only more portable but also more convenient.
I would gladly say that both Dewalt DCS391B and DCS391 score a tie in this category.
Motor And Drive Configuration
Before the major upgrade, Dewalt DCS391 was only capable of 3,700 RPM. However, the current version of this circular saw blade can run up to 5,150 RPM. Its counterpart also has the same RPM motor.
However, here comes the difference between the two models. Although both of them utilize brushed motor power, DCS391 runs on 18V only, while its counterpart is compatible with a powerful motor of 20V. This higher voltage allows DCS391B to accommodate more demanding woodwork applications.
Therefore, Dewalt DCS391B gains a valuable upper hand in this aspect.
Both Dewalt circular models possess the equivalent 24-tooth TCT blade (also known as carbide-tipped blade) with a 6.5-inch diameter.
Rip Fence And Capacity
You will not have the rip fence coming with these two Dewalt circular saws. Thus, if you want to cut a straight line more easily, consider purchasing this guide rule separately.
Moreover, they both share an equivalent 0 to 50-degree bevel capacity. The bevel adjustment is also similar by rotating the black plastic knob on both saws’ front parts.
However, unlike other high-end circular saws, which have a hard stop at 45-degree angles, both DCS391 and DCS391B have no such feature.
Speaking of cutting depth, the two circular tools also have a similar spectrum, spanning from 1.625 inches (45 degrees) to 2.125 inches (90 degrees/0 degree).
Once again, you can set your desired cutting depth with an identical method of flipping a lever located behind the motor on the saw’s right side. Doing that allows you to pivot the base up and down.
Shortly speaking, it is an easy draw announcement for both models.
The miter gauge is more commonly employed with table saws. Hence, there is no further discussion about it for these two Dewalt cordless tools.
Both circular saws belong to the same DCS391 family. Thus, they share the same set of additional features. One of the most noteworthy options is the electric brake, which gives operators more control and safety over their work.
All in all, the two Dewalt models have a tie in this category.
The safety feature of trigger lock mechanism appears in both circular saws. Pulling the trigger alone is not enough to activate the cutting tools. In addition to trigger pull, you must also press the little tab on the handle.
Moreover, you can find two tabs on both sides of the handle, allowing both left-handers and right-handers to run the tool effortlessly.
In short, this safety mechanism makes both circular models equally safe for operators during the cutting process.
There is a similar box of tools upon both of your purchases. All you will receive is a circular saw. Do not expect any additional gadgets like charger, battery, or rip fence coming with the packages.
Nevertheless, be aware that there is an onboard hex key (Allen key) for both saws. This small half-moon tool will come in handy when you need to replace the cutting blade on later occasions.
Briefly speaking, this final criteria witnesses another draw in this Dewalt DCS391B vs DCS391 matchup.
Quick Rundown Of Dewalt DCS391
- Very compact design
- Beautiful appearance
- Convenient onboard hex key for blade change.
- Consistent performance
- Dust collection port gets in the way of operators
- No 45-degree bevel hard stop
Quick Rundown Of Dewalt DCS391B
- Strong motor power
- More productive in woodwork cutting
- Lightweight structure
- Aesthetically designed
- No guide mark for better precision
The winner in this Dewalt DCS391 vs DCS391B is the latter contender. The model has greater power, allowing it to handle tougher cutting and ripping.
Nevertheless, Dewalt DCS391 is a wonderful investment for those homeowners with light projects.