One Eye'd Dude: Test ride. Only way to know for yourself.
I think the perceived power "feel" difference is the result of two things:
(1) K is higher revving; Busa has power compacted into lower RPM range
(2) K's funky roll-off/roll-on power hesitation
Those two things equal, even with Busa's slight actual HP advantage, I think we'd be hard-pressed to "feel" a difference.
All in all, both bikes to me will throw you back and spike the adrenaline. Not sure what is meant by "uninspiring".
Power aside, sorry, K just dominates from here. Through the corners, the K is pure joy - rides more like a liter bike, but more stable because of extra weight and longer wheel-base. I don't know about you, but this is just as important in the "fun" factor to me as the oodles of power we all tirelessly compare/contrast. Then, again, there's that whole comfort factor. K is just more comfortable. Aside from ride-ability, there's fit/finish. K's got better metals/plastics. Check it out... go squeeze the levers, turn the ignition key even or the gas cap - run your hands along the tank plastic, believe it or not, check out the seat (most comfy of all beemer bikes) - all those things you like/want to mod on the Busa.... done. Single-sided swing arm is too cool.
Are these things worth the money to you? I dunno, but they were to me. But, I wasn't gonna dish out 17,000+ for a sport bike - I don't care how much it might be worth it. That's why I opted for the standard model (heated grips/ABS included) after the 2010's came out. Like I said, got mine for $13,600 ($15,800 - $1000 2009 incentive - $1200 negotiating). Otherwise, I would've gotten the Busa... a used one off Craigslist at that.