whats the difference between

97 sti wastegate solinoid
01 sti wastegate solinoid
07 sti wastegate solinoid

i have all 3 and had a problem with my 97 sti one so my mate got me the 07 version and i must say what a difference. car pulls like a train all the way to redline at about 1.2-1.3 bar. feels so much better than what it did. but now i have a spare 01 version and am wondering if this will be any different