for what it's worth any ECU can make power, any ECU can make 100rwkw, 200rwkw, 800rwkw, 1200rwkw
how the ECU is tuned, the car, the usage requirement, it's usability, how it installs, features, support when things go wrong, price and availability of tuners is what is the deciding factor when choosing an ECU
so forget how much power a guy can make using an ECU