We will compare the similarity and difference between DeWalt DWE7491RS/DWE7491X, DWE7485, DWE7480, and DWE745 in this article to help you make an informed purchase.
Read comparison of DeWalt DWE7491RS and DWE7491X before making a purchase.
The only difference between Makita SP6000J and SP6000J1 is that the SP6000J1 comes with a 55-inch Guide Rail. The rail part number is 194368-5, commonly costs over $70. Thus, the SP6000J1 is more expensive than the SP6000J.
SP6000J or SP6000J1 which one to buy?
If the 55-inch track is too long or too short for your projects, you can buy the cheaper SP6000J, then use the savings to buy a shorter Makita 39-inch track(part number is 199140-0) or a longer 118-inch track (part number is 194367-7).
Otherwise,just purchase the SP6000J1.
The difference between DEWALT DWE575SB and DWE575 is that the DWE575SB features Electric Brake and comes with a carrying bag while the DWE575 does not have the Electric Brake feature and the contractor bag.
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This electric brake helps stop the blade faster, allows the operator to do more cuts within the same period of time, and provides additional safety.
The carrying bag is for storing the saw and the blades.
You can watch this video to find the difference on blade stopping time of the DWE575 and DWE575SB:
If you are looking for the best undercut saw for door jamb,frame,trim,baseboard,etc.,then you can have a look the following tools. They are handy for cutting under door jambs, remodeling your house, installing new flooring.
| Product | Type | Rating | Price | |
| 1 | Crain 835 Undercut Saw | Corded |  |
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| 2 | Roberts Jamb Saw 10-46 | Corded |  | Check Price at Amazon |
| 3 | DEWALT DWE315K | Corded | |
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| 4 | Rockwell RK5132K | Corded |  |
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| 5 | DEWALT DCS355B | Batter Powered | |
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| 6 | Crain 336 Undercut Saw | Hand Saw | |
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There are two types of undercut saws you can choose from:
an electric undercut saw or a hand saw.
An electric saw will save you time and effort, and gives you better precision, but costs more money. Whereas a undercut hand saw will be at a cheaper price, but costs you much more time and effort on cutting. Unless you are a purist, or have plenty of time for cutting, it is better to get a power saw.
Besides the above mentioned jamb cutting tools, there is also one less expensive power tool you can consider:
an Oscillating Multi Tool.
It can also cut under door jamb as a undercut saw does.