Hard or soft chines & their effects on rolling

I plan to have a new fishing boat built & I need help deciding on which hull design to go with. Stability, crew comfort and fuel economy are my main objectives & I'm looking for a cruising speed of at least 20 knots with a 220-330 Cummins diesel. My two choices are:

1. 26' x 9 1/2' Lobsterboat design with a deep forefoot, relatively no deadrise at the transom, unweighted keel, soft bilge, semi-displacement.
2. 27' x 9 1/2' caroline style fishing design with sharp entry & 12 degrees of deadrise at the transom, lots of tumblehome, but hard chines.

Which design would roll the least?

[mmd]

I prefer the motion of the lobsterboat hull over the chined hull. While the chine boat will have a better speed potential, the chines cause rapid decelerations in the rolling motion, which can get rather fatiguing to those on deck.

Originally Posted by mmd

I prefer the motion of the lobsterboat hull over the chined hull. While the chine boat will have a better speed potential, the chines cause rapid decelerations in the rolling motion, which can get rather fatiguing to those on deck.

Thanks MMD. From what I have heard the lobster boat keel also helps to reduce the rolling somewhat.

[dereksireci]

In general a round bilge design will produce a longer period of roll compared to a hard chine hull. The semi-displacement hull will roll to a further angle of heel, but the vessel will return more slowly. A hard chine hull will tend to want to snap back much more quickly, producing discomfort for the passengers, especially with 12 degrees at the transom.

I think the chosen power is better suited to the round bilge hull form too considering fuel consumption.