Capcom needed a new joystick for street fighter 2 when it was first coming out. Capcom went to Happ and they designed the competition joystick specifically for street fighter 2. I got this information directly from Happ Controls but who knows, they might have just been trying to make a sale. Remember when SF2 first came out on SNES and capcom issued the official SF2 arcade control for the snes, it was called the "competition stick", I bought it when it came out back in the 90s and it contained a Happ competition joystick, i don't think this was a coincidence.