I've tried most of my knives on carving pumpkins, excepting most of the damascus. They seem better suited to destroying them, very efficiently I must say, rather than carving them. The most suitable ones are thin, narrow, flat grind. I had better luck with the kitchen selection than with my utility and tactical favorites. Obviously, no chisel grinds. The Elishewitz Phantom worked surprisingly well. My wife thinks I'm nuts.She's wrong;I'm stupid.
A neighbour uses some kind of thin electric knife to make astounding patterns, so T4 wasn't far off the mark.