Check these videos made for Puig windscreeens. They show where the wind goes.
The first is the sport version:
The second is the tourism version:
I bought the Givi windscreeen because it is wider than the Puig Sport, and because in my opinion looks better.
I feel an improvement on wind noise and in if I ride in a sporty position: I feel the wind just on the shoulders and on the helmet.
If you ride on the motorway...go fo the Puig Tourism or something like that. But...it should be better to buy a Versys in that case. I do not like naked bikes with big windscreens (just my personal opionion).
If you ride like me on "normal" streets you feel much more better with this Givi.