Looks are strictly a manner of opinion... I think the ZX14 looks
OK, but that's about it... I still prefer the look of the Busa (even if some feel it's outdated) over the new Kawi offering.
As far as performance, I honestly don't think there's going to be much difference, but we'll just have to wait and see on that one. I don't have a "stock" Busa, so I'm not too concerned about stock vs. stock... Hell, even if I had a stock Busa, I could give a fuck less whether the new '14 outperforms it. I bought a Busa because I wanted a Busa, not because it was bigger/better/faster than whatever else.
Sure, there are tons of squids and band wagoneers out there who may jump the proverbial ship, but who gives a crap. Buy/ride what you like, and enjoy it. I for one don't give a rat's ass what anybody thinks of my decisions/tastes.
My $.02...