difference between these two cams?

The bullet seems a bit short on duration for a 4" crank

What kind of issue could that cause. Less scavenging of the exhaust? Or maybe if I decide to put a 100 shot on it one day it would fall below what I need?

Maybe I better call Bullet after more intel (from you guys) and discuss further.

I really appreciate every ones help. Having read all I could about cam design before I posted is helpful but having practical guidance from experience is the best help.