RS-R ExMag GT2 exhaust syst. or HKS Drager??Which is more powerful?

[Block_burna]

I like the straight through design of the RS-R GT2 and not alot of people around have it, but I here that the HKS Drager would be more powerful. I hate the big canister design of the drager but if its more powerful, who cares. I'm leaning towards the GT2 but if every agrees that the HKS has more power I'll get it. Thanks.

-Block_Burnin S14