Would a DeWalt or Makita router make it better?

I am using my X-Carve 1000mm for cutting Kydex.

I primarly cut .125" and .093" sheets, I am using 3MM Solid Carbide End mills with “Diamant tooth”.

Right now I am stuck with 400mm/min and 0.3mm per layer (using the standard spindle)… If I go any higher it starts to make ugly cuts and the spindle will complain.

My question goes like this - Would a DW660 or a Makita RT0701C be able to increase the the speed or cut depth?

The dewalt 660 is tested by inventables.
Its double the wattage, over twice as fast (rpm) and louder

Here is a link for a spreadsheet of the different spindles tested by inventables: