What part of NC? I'm from Hillsborough.

First I have never used the Swiss, but do believe its fence registers to the outside of the timber and the chain is turned 90 against the grain. The makita has to be clamped and can take some time. In addition, the chain that cuts 90 like the swiss leaves tear out usually hidden behind the shoulder unlike the top and bottom of a mortise cut with the makita.

Also with the Swiss you could (I assume) buy a 2"bar and a 1.5" bar so one plunge hits the full width of the mortise. In theory with the Swiss you would not even half to layout the sides of your mortise, because the reference is set. Just layout top and bottom and roll.