301 = 7.5x 5.25
15-91 = 7 x 5
401 = 7.25 x 5
I haven't tried my 301 for FMQ yet but hear good things about them, the 15-91 is great for FMQ, and the 401 has the horizontal bobbin, and other than being a good general stitcher with some decorative cam stitching, have not tried it for FMQ either.
The 301 is the most portable, and lightest weight.
Last edited by Charlee; 09-21-2012 at 06:58 AM.