open filter draws in hot air reducing engine power, closed/sealed filter gives slightly better throttle response, V.Small probably unnoticeable power gain, same goes for a panel filter in the standard air box, but going that route you dont get the noise that an open or closed filter gives.
if you use a relocated kit like the pic above you will loose torque due to the fact that the inlet tract is far too long, i had one and got quite a large torque increase going to a pannel filter! Relocation kit is a good idea in theory but just doesnt suit the engine.