I know it's an apples and oranges comparison....but anyone know how it compares to the 919?
I rode one back in 2006, when I still had my 919 (and a 2003-spec R1) to compare with. You can see my write up at: Riding Triumph's New Models
I do recall that it was uncomfortable, even for a race-rep, and my neck muscles were screaming after a few miles from having to tilt back my head so far to see down the road.
In my opinion the CBR600RR, while undoubtedly less "exotic", is certainly more comfortable and probably has better fuelling. The Triumph looks better though ...
As to how it compares with the 919 ... well, as you said, it's apples and pears, but here are my thoughts anyway.
The 919 has much better fuelling.
The 919 is much more comfortable.
The 919 has livelier steering (which can be a good or a bad thing, depending on your perspective).
The 919 is much easier to manage in town.
In British "real road conditions" the 919 is probably faster, though it wouldn't necessarily be on quieter open roads, and almost certainly not on the track.
The 919 has more accessible mid-range.
Subjectively, most people would say that the Triumph is better looking and more "cred", if that sort of thing matters to you.
Hope this helps.