Welcome, another bbb on the forum, bmw bad boy goes by the moniker bbb too lol...both great bikes, the RSV has a good rep, as does the beemer..Road, track or Both ? What's making you think of changing?
2013 rsv4 track only use. I recently tested on track the S1k and had a lot of fun, wheeling on 2nd, 3rd and 4th gear [emoji16], insane.
I will be looking for a low mileage with M pack and Carbon.