My unprofessional player evaluation:
I came away very impressed with Vaughn's sophomore tape, and it is hard to imagine he still has two years of high school ball left. His get off at the LOS is elite, and probably some of the best I've seen at the high school level. The violence he plays with is evident. He doesn't appear to be just a pass rusher, as he holds up against the run well. Vaughn is already 6'4", 225; physically, I would expect him to be game ready when he gets to college. Rivals ranks him at #201 overall, and 247 ranks him at #19 overall. I have a hard time believing there are 200 players better than Vaughn. I think a top 50 ranking is fair.
If he were to choose Notre Dame, I think he would be in the rotation immediately.