You do not need dyno sheets to decide what's better. You need to decide what you want for power and where you want the power band at then just go for it. There are only a few high power kits out there to choose from and then you can do many smaller mods on pistons and cams. Carpenter, TTS, Echo cycle, And Neville Lush racing covers the power adders out there. Oh and Boost is good if you can get a reply from them.
So I think I will post what Nev posted once which is the best written words for all kits.
"RIDE THE BIKE NOT THE DYNO SHEET"