I hear this sort of talk alot, 1.5 degrees makes the difference, can you even see that difference. Deadrise is the measurment at the transom, That does not mean the deadrise at the bow (where we meet the rough water) may not be very deap.The Howard 28 is a nice fast boat but only has a 22.5 degree dead rise. Not ideal for running in the Ocean. A 24 degreee is usually prefered.
The new Skater 399 Vee is 22.5 deg, It seems to go better the rougher it gets.
There is alot more than deadrise to dismiss a boat. The feeling of the ride will be far more effected by things like strake width and angle, pad, and chines which all make displacement and of coarse the big one is weight.
Every has what is important the themselves, personally, I want to rigidness and balance.