Sold my 2013 ZX14R today and rode away on a new silver Busa. I've had 15 bikes in the last 34 years, everything from 3 to 207hp but this is my first ever brand new bike.
I know the engine is tight but so far in comparison to a 14R.....
The 14 would pull strongly away with just about no throttle and only using clutch control, same approach on the Busa and it's a world apart, you need throttle to get going, 0 to 30 on a 14 is near instant, feels a bit laggy almost on the Busa. Once you are going it's well mannered, rides well, is slightly lowered geared than a 14, I can't give it the beans as I'm limited to 5500rpm for the next 470 miles!
Overall, very similar, the Busa has less of a stretch to the bars, the bars feel physically smaller like they're not as wide. The clocks are nicer though, the TFT is really nice. Both are incredibly stable, the 14 loses 30lbs from a dual slip on, the Busa seems to only lose 10 (Yoshi R77).
Very happy with my first Suzuki. Old school big cc in a new electronics package. Glad to be here!