I haven't watched any of them enough to truly know how they'd comp alongside former UNHers. So take these with a grain of salt...
However, I'd expect the MacPherson twins to be more offensively focused & gifted along the lines of an Andrew Poturalski; proven scorers, hungry to impact the offensive end with the ability to help defensively primarily through their transition & possession games. Sadowski seems to be a more well-rounded, two-way prospect similar to Grayson Downing; a dependable player who can handle two-way responsibility while contributing a lot of offense on a top-line or creating for himself on a secondary line...
I love these three - I'd push in my chips and bring them all to Durham NEXT year. The rest of the incoming prospects don't resonate at this level for me, with the potential exception of the future goalie, Grout...