I believe the 325's are on a narrower last than the others?
I've got old Terrocs, Flyroc 310 and some very new Terrocs. IMO there is less underfoot padding on the flyrocs.
I like the fact that I can feel the ground detail through the soles
Mine have held up pretty well, the oldest Terrocs have done well over 500 miles as well as days of everyday wear. Still used regualrly for work.