Some guys are fast out of the blocks but don't have the great top end where they accelerate for the whole 100m, or even fall off slightly during 2nd half of race. These are guys who might have strong 40s but just ok 100m.
Others might be slow starters but once they get rolling (think Josh Adams) they have good top end acceleration so they might have an OK 100m with a weak 40.
Then there are the guys you really want who are explosive at the start (good 40) and have the good top end acceleration to build on the fast start and turn in an elite 100m.
Ultimately unless you can go watch to see what type of runner they are it's hard to correlate the events. Based on how I recall Fuller running, if he trained specifically for to 100 he could probably be a 10.4 type guy.