At minimum Knight is USAH's best goalie prospect since John Gibson. At the same age, I think they're basically in the same exact tier, so it'd be splitting hairs regardless of one's preference. One major difference though is that Gibson was much more of an unknown until he got to the NTDP and started to make his mark, while Knight has been pretty hyped since he was 13/14.
I'm interested to see how Askarov tracks as well. He certainly looks the part of an elite goalie prospect, but I'm also not sure how anyone can say he's definitively a better prospect than Knight or any other top flight goalie prospect given the unpredictability of goalies. So many scouts tout all the medals Askarov has won and his stats in doing so, impressive feats no doubt, but it's not necessarily a sign of stardom; it wasn't that long ago that Jack Campbell did similar, but in more impressive fashion. That's not to say I'm arguing in favor of Knight over Askarov because I'm not, I just think with goalies that level of ranking is largely meaningless. I think tiering goalies is more reasonable and I'd put Askarov and Knight in the same tier at this point.