The problem with differentiating players at this point is no one is elite, and other than Hagg, no one is playing at a high level, NCHC may be the best conference in college hockey, but it's not much above junior hockey.
Hagg is tough b/c we watched his growing pains, had he played junior hockey, then come to the AHL, followed by this solid season, he'd be ranked higher, his so-so second AHL season has framed him as a disappointment, but gee, he's going to turn 23 in his debut NHL season. Not exactly an AHL scrub like we've seen in the past.
The difference between Allison, Ratcliffe and Laczynski is where they were drafted, i.e., scouts' perception of their skill level. Right now there isn't enough evidence to overturn that inintial judgement, Ratcliffe is in juniors, and Allison and Laczynski had similar freshman seasons, both were solid, neither was elite (which was my point comparing Laczynski to top freshman scorers). In a year or two, they'll sort themselves out.
Vorobyov is tough, while he had a great WJC campaign, let's face it 11 points in 44 KHL games isn't exactly the mark of a future top 6 player. But he's only 20, a good AHL season could improve his stock.
Vecchione actually has the best on ice credentials, a great college career, while he's undersized, he's more like AK, short but stout. This year in the AHL will tell us if his skill package translates to the pro game. As an older player, he can't spend a couple years marinating like the 20 year olds out of junior, he has to make a Read like transition to have a chance.
Bunnyman is the poor man's Allison, a little smaller. Great post draft goal scoring campaign, but only 52 points in 64 games with 16 PP goals - will he be good enough to do more than tip in goals in front of the net?
I don't see a star in this group, but a lot of guys who could flame out and be marginal, or step up into 2 pairing D/middle 6 roles. That's why it's so hard to separate them.