Well Fin, you can always do what BigBS and I did and get both! In all honesty, when comparing the Gen1 ZX-14 to the Gen2 Hayabusa, I've always felt the Hayabusa was of slightly better build quality. It just seems like that motorcycle was engineered more thoroughly than the ZX-14. That extra couple foot pound of torque is noticeable at lower revs too. The ZX-14 has true character though. I'd actually consider trading off my 08 Hayabusa for another 08 ZX-14...but I can't let go of the busa either.
Now you've stepped up a notch to the Gen2 14R. It's the ultimate king of this whole category of bikes and there will probably never be another (unless you want to include the H2 in on this). My 100% stock 2024 14R feels remarkably similar to my Gen1 that had about 80 lbs taken off of it. The Hayabusa is another great big bike that threads a needle in handling when you get acclimated to it. The 14R accelerates hard like the other two but when it hits 7-8000 rpm, it becomes an absolute wild beast. There is lots of extra power there. It might be the more recent factory tuning because most Gen2 ZX-14R owners tell me their's is absolutely linear throughout the revs. I thought the bump in power might have been due to Traction Control. My friend at work has the same bike and says his does it with TC on or off. It's a cool looking bike but if you were looking for the strongest hyperbike ever manufactured, you got it.
I would consider an older H2. I still don't know if they cracked the ECU on the latest ones. I never fell for the Gen3 Hayabusa. It's a beautiful bike but here we are four years later and everyone's still trying to come up with aftermarket stuff to make it as fast as it should have been out of the crate. The latest thing I heard of is aftermarket cams. You shouldn't have to go in and do engine work on a brand new, much more expensive bike to bring it up to par with the previous Gen. The Gen3 Hayabusa took a nosedive IMO. It just doesn't have the intrigue the earlier gens have. Maybe Suzuki will make a better one but I doubt it. It's going to end with the 14R. The H2 will be holding the spot after that.
08 MIDNIGHT SAPPHIRE BLUE ZX-14 Now Deceased, will be resurected
2024 ZX-14R bran friggin NEW!