turbo knowledge anyone?

[2.5bluenob]

Can anyone educate me please!
If two different turbos are both running the same psi but one turbo is larger than the other does it mean they are producing the same power? or is the larger one flowing more air and making more power? or not as the psi is the same? this is something that has been puzling me for ages and my little brain cant work out the answer.
Any help appriciated
Steve

[2.5bluenob]

thanks for the help everyone. i was kind of thinking along the same lines as Andy.
the reason i asked is i did a few upgrades all at the same time and a remap and i cant tell if changing my turbos to bigger t25's was actually a worth while job. Im running 1 bar which i could have done anyway which i could have have run on the smaller turbos. So im trying to guess which one is the best performer but the old ones were not running as much boost so unless i put the old ones back on running the same boost ive got no comparison.
As the boost gadges on our cars dont seem to be very acurate its hard to tell from looking how early im making full boost an how its holding through the rev range.
Cheers
steve