I have had three blackbirds, and a ZZR1400, It would definitely depend on the rider, but if you said same rider same circumstances the blackbird would walk it I am afraid....
The crosstourer would pick up a little quicker, but when the blackbird got over its 'flat' spot (I) models more it would walk it with arm wrenching acceleration.
Yes the blackbird was a little top heavy, but be fair the crosstourer is hardly a featherweight built for scratching.....
Ride it, buy it for what it is, and that is something I am learning myself, its a very accomplished, very comfortable, and VERY easy to ride powerful bike......
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As for going round corners, you would be surprised, you need to grab the blackbird by the scruff of its neck and manhandle it, so would be very tiring to scratch,
You would also need to be accurate, as being top heavy, and phenomenal speed, the inertia would make you go straight, or the line you chose,
But you can make them work if you put the effort in,
I have to say though that the ZZR handles SO much better (Very neutral for a big bike),
I still have a very big soft spot for the blackbird though.......