I liked both.I have had both and shot both at the same time.On the same model (HS Whip Longbow),same length and same poundage essentially.I was equally accurate with both.They were both lower style grips which was most important for me.
Dan said that the traditional Toelke grip should be shot with a more relaxed grip.The classic you could hold a bit firmer when I talked to him.
I think some of the thumbrests look really sharp.
I never had any problem locating the grip on either.Thumbrest or not.Some may find the thumbrest more secure and easier to duplicate in a pinch or when under pressure of a quick shot.
I think its apples or oranges.