My understanding is the Cruzer has the same wing they just remove the slats and add wheel pants, but that airfoil seems to have a huge amount of drag much over 100 knots and throwing and extra 20 hp at it doesn't do much.The 650 is a great plane, but it's a really tight fit for two people. The 750 has waaaaay more interior room. The bubble canopy on the 650 makes it a greenhouse, so you should keep that in mind if heat is a concern. You can crack the canopy during taxi, but you can keep the doors on the 750 completely open, which is way better. I have problems with heat, and that's the primary reason I chose the 750 over the 650, even though the lower speed didn't really appeal to me either. Mine is a STOL because the Cruzer didn't exist yet when I bought my kit. The other primary reason was the space. But sitting in them is the right thing to do. That's how I finally made up my mind. I'm hoping to be there next month too, so maybe we'll see each other.
I wonder if they considered putting the CH650 airfoil on it, "cruzer 750B". Probably a lot of work, but then again we have solidworks now so maybe something they are considering. They 750 is very popular, I imagine if they sold a 120knot version of it it would sell in large numbers.