Diff betwwen 02 WRX Heads VS 05 WRX HEADS?

I heard that 05 heads can produce more power than 02 heads
and that they could rev up ti about 7,400 to 7,500 without
loosing as much power as the 02 heads...

Can someone help me with this

Thanks!

Ok Suby Experts! HELP!

as far as i know they are exactly the same. there is a good chance the 2006 WRX (2.5L) heads are different though...

they are EXACTLY the same besides the buckets.