Helmet choice and eyeball wind tunnel

Considering whether the Wing57 offers me any potentail advantage over the Wingspan. I’m confident the Wingspan is a good helmet for me - wind tunnel confirmed it compared to the Advantage 2 and Spec TT2. Here’s my current position - seems the tail extension of the Wing57 might make a difference?

http://i149.photobucket.com/albums/s64/TH3_FRB/Final_zps07507380.jpg