Cant comment on the various differences between flashes, but from what I have read; they are all pretty close in power. GET ONE OF THEM! DO IT!
As I get more and more seat time on my bike with its newfound power (brocks full ex, pcv, guhl flashed, bmc filter, custom tune); I keep amazing myself. Not so much by the power increases on the big end, aka 8-9000+. But by the increased throttle response and midrange that the ECU flash gives. IF I had really known how different it would be, I would have done it ASAP. First thing, for sure.
Its a totally different bike, more like what a "next gen" zx14r(r) lol would be. Not sure exactly how to describe it.
But for sure, how do I KNOW its better? I can tell you. I surprised myself. And in the end, I was giggling like a little school girl. So, heres the deal. Im out riding one of my favorite roads that has a few little crests (small hills) and some ok corners. My friend on his 01 Fz1 is behind me. Im not pushing really hard, wanting to keep him in sight behind me, since he's pretty new to the rd. I'm just blipping the gas going over a few of the rises and dips in the road. fun stuff, w/o going hard. Ive got it in F1, roads were still a bit cold low 40's out.
and I roll it on a bit, maybe 50% throttle in third; as I clear the rise in the road; and up she comes. power wheelie in 3rd, half throttle, at maybe 5-6K rpm's. It floated about a foot above ground, nice and easy. I rode it a bit and set er back down. pumped my fist in the air, and yelled WHOOOO! Its just the little surprise of it, and the fact that Ive NEVER had a bike loft the front tire so easily. My modded 03 R1, which should have been kind of a wheelie machine never powered it up in 2nd, other than during a redline shift. Let alone 3rd.
WHAT A MONSTER THIS IS! Its sweet and docile, and forgiving; but it will also catch you out and surprise you. TERRIFFIC!!!