Allen was great for Hartford until he hit the college rookie wall. He was solid defensively, good at starting a rush, and contributed plenty offensively.
Kristo was unimpressive the whole season; or rather, he was unimpressive in his consistency from shift-to-shift, game-to-game. He's still rather selfish with the puck and contributes nothing at the other end of the ice. There's talent there, but I'm incredibly skeptical that he'll be able to put it together at the NHL level.
I have never disagreed with Leslie as much as I did when she put him #1 on our prospect list. That was farcical, IMO. Kristo is a huge question mark.