Both, with AI support, it can manage how much energy you'd have to use to defeat your opponent by manipulating the power suit.
Since Katsuya's AI skipped the permission/contract part, they're very uncoordinated.
It's not that Katsuya isn't compatible with the Alpha 2, it's that Alpha 2 just straight-up skipped the permission/contract part. Alpha 2 is basically an uninvited symbiotic ai parasyte