Personally I wouldn't say the Tuono 1100 is better looking. I find the S1000r more attractive in a odd ugly way. To each of its own!I didnt like the looks or finishes of the first gen Tuono v4 1000 and opted for the S1000R as well, but when the 1100 factory came out I was smitten with the new look, the better low-end, and the RSV4 bodywork. Yeah the S1000R still does some things better than the TV4 factory but the Tuono is so much better looking and that V4 engine is in a class of it's own.
From the seat of the pants I think the TV4 is the quickest of them all - if not its the most satisfying. Both bikes are worlds better than the SF in instilling confidence in the rider and ease of use.. The biggest downside to my first gen S1000R was the suspension; that Electronic suspension system was fine on the track but utter crap for normal everyday riding. Both the SFS and the Tuono factory with their Ohlins supensions are so much better.
My friend has a 2017 Tuono RR. We've done a few straight line runs. We haven't had a clean all out race where we row through the gears but we've raced many times from 5th and 6th gear doing 30-50mph just to see the torque. Surpsingly the S1000r outpulls the Tuono everytime. Its like as if the S1000R started a gear lower than the Tuono everytime.