Yep, had 2 busa"s and a bking
04 le and a 08 pumpkin
The busa soaks up the road better, more leg room, a little less lean to the bars, and torque everywhere.
The BMW feels like a 600, light nimble, brakes are just insane, has no where near the mid range of the busa but you get it above 8000 or so and the it's like a damn rocket.
I have done some 350 mile days on it already and will do a few 500 mile days, it's not as comfortable as the busa but your muscles will adjust to the new riding position and it's just fine for me.
The electronics are what really make the bike special, power modes,abs, dtc,, gear shift assist.
The 3 year warranty axle to axle and 3 year road side assistance really tipped the scale for me to. Also BMW is paying for my track day, they don't deny warranty coverages for track use, try doing that with a Suzuki, tell them you raced it and bye bye warranty.
Go demo one, take the bike out and you will see
Ps I still love the busa's and will pro ally get another one sometime, so don't cane me