Tigercat 635E is 6 ft 11 in longer than Tigercat 620E — 31 ft 1 in vs. 24 ft 2 in, a 29% difference.
Tigercat 620E and Tigercat 635E stand about the same height, both around 10 ft 4 in.
Tigercat 635E weighs 13% more than Tigercat 620E: 48,750 lb vs. 43,200 lb.
Tigercat 620E runs 221 hp; Tigercat 635E runs 260 hp.
