So I've driven the first gen a bit with the HE351CW... it's an AWESOME turbo.. spools nearly instantly, pushes 45PSI, and I'm getting considerably better fuel mileage than I was getting with the 60/64/12 HX35/40 hybrid.. I used the same billet compressor wheel in both, so it all comes down to the exhaust side
Buddy tried the 9cm from an HY35 which looks really similar, but it's not sounding like that's performing all that great, would be good for a truck with closer to stock fuel though.
Here's a little vid for the sound.. sure responsive
https://photos.app.goo.gl/AhbkEja2JRXaFgG9A