I have ran a stage 2 on my 2018 mountain cat and it ripped. Solid kit that truly added performance and no issues.
I had a supercharger on my 2019 alpha and it was insane. Once installed I never once messed with it and it was night and day difference compared to a turbo.
This year I am supercharging my 2020 alpha. You're welcome to try it out anytime you get out to Wyoming. I ride Togwotee for the most part.
Their "stealth kit" sounds like a pretty awesome option. The l2 lightweight silencer, intake, clutching and a refresh. 13lbs lighter and 8 more HP.