With the appropriate 4 blade, you'll gain performance in every area except top end speed. You will lose some top end.
The only exception to that rule is when running a surfacing 4 blade over hub cleaver, and even then that's only if you have LOTS of power to spare, say running a 300 HPDI on a 20' SeaCraft with a jack plate.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury