Another can of worms here...all boats will be uncomfortable or dangerous in some types of sea, but comparing twisters, Rival 38's, Sweden 38, sigma 36, old half,3/4 tonners and a 1991 Bav. The Bav was the prefferred boat for rough weather. Fine entry heavy boats dig into steep waves take on board huge ammounts of water and pitch to very steep angles. Wider flatter bottomed boats will slam (but you can often shift the angle of attack to help)

My Bav hove to in 10m swell with lots of wind and breaking waves and was comfortable below, it also was happy with a following breaking sea for a couple of days of a similar size, lifting her bum as waves passed under. fine entry heavy yachts were getting cockpit filling seas from astern and were not happy, lots of extra loads as the boat was slow to react to the approaching waves.

With any boat you sail it to the conditions, and you treat them very differently. Pushing them hard while racing is very different from cruising and I'd agree with crockery smashing slamming on 3/4 tonners of 1980 going upwind in steep seas, where a Rival 38 would a softer ride.