CX-3O Evolved vs Best Electronics CX-30 Gold

[7800 Guy]

I am in the market for a good quality set of paddle controllers and I'm not sure which ones to get. If the CX-30 Evolved uses two independent buttons what use is it? What games actually support that? I'm leaning towards the Best Electronics version with the gold contacts but the CX-30 Evolved would match my 7800 although I'm not a fan of the Pain Line™ design. My hand was cramping just after a few minutes of playing.