Tigercat 635D is 4 ft 7 in longer than Tigercat 615C — 30 ft 8 in vs. 26 ft 1 in, a 18% difference.
Tigercat 615C and Tigercat 635D stand about the same height, both around 10 ft 4 in.
Tigercat 635D weighs 10% more than Tigercat 615C: 47,250 lb vs. 43,000 lb.
Tigercat 615C runs 220 hp; Tigercat 635D runs 260 hp.
