Deere 768L-II is 5 ft 2 in longer than Deere 640H — 29 ft 9 in vs. 24 ft 7 in, a 21% difference.
Deere 768L-II stands 0 ft 9 in taller than Deere 640H: 11 ft 0 in vs. 10 ft 3 in.
Deere 768L-II weighs 71% more than Deere 640H: 52,245 lb vs. 30,625 lb.
Deere 640H runs 185 hp; Deere 768L-II runs 281 hp.