This sounds somewhat like a situation where you are robbing Peter to pay Paul. Going to a softer drawing cam but then increasing your draw weight somewhat defeats the purpose of going to a softer drawing cam in the first place. I say "somewhat" because it is possible that a cam with a more rounded bell shape draw force curve may be a bit easier to draw because of the smoother transition into and out of the bow's peak weight plateau. However, the amount of effort generated may yet still be somewhat the same between the two scenarios you are presenting.

Basically, it really comes down to the two bows that you are trying to compare at the two different draw weights.