JMHO but the ST would be my choice. Don't disagree with gator the riding both is a good idea but the bikes are going to handle about the same. The frame mounte fairing on the ST is going to make for a more comfortable ride. Perhaps the choice shoud be based on whether or not longer rides are typical. If some 500 mile days are typical, definitely the ST. If around town riding, commuting to/from work and some weekend 200 mile days are more the norm, the S. Either bike, with the 117" motor upgraded to Stage II will be a Harley hot rod.
that or a eng guard you can put pegs on,or a mustache eng guard.I was gonna put forwrds on my streetbob,but got used to mids,and added a guard for relaxing occasionally