Speeder, what everyone else said....gotta ride 'em both.
If that's not possible, the new fairing does help with the buffeting issues that some of different heights may experience on the batwing. However, a very good windshield (Freedom, Clearview, etc) will accomplish the same effect as putting a mail slot in the faring...cut down on buffeting. That said, I don't know how you wouldn't get buffeting/wind from the windshield on the RK either. Most windshields I've had over the years had some kind even moving the shield around up/down (if possible). No radio on the SERK this year (may not be an issue for you) but you have a new designed head unit in the Special and it does sound very good...much more "umph" than previous stock sound systems.
So, the choice is yours....both are very capable road/street/touring bikes and look good "touring" town, too. Good luck in whichever you choose...really, you can't go wrong with either scooter.