Sandin is a very lsolid person for his age. He was drafted at 5'11, 190 pounds. I don't think it's a stretch to say he started last season at 5'11 200+, which is a big and strong individual.
Lilly was sheltered most of the season, and Sandin played against the top lines. That's why I'm guessing you think he's looked better.
The playoff run Lilly defintely looked better than he did in the season. I'm still worried about his point totals, because even most of the worst offensive dmen in the NHL dominated the AHL points/play wise.