Same aircraft though from the Mk.Ib on they were equipped with catapult spools plus an arrester hook. Mk.Ic had cannon. de Havilland propellers were preferred. Merlin XX in the Mk.IIc plus naval avionics. Others will bring the specifics............
AFAIK, the arrestor hook and catapult attachment points were the only changes between a Hurricane 1 and a Sea Hurricane 1B, and since the weight added was on the centreline it should have very little, if any, effect on the roll rate.