Giro Synthe vs Foray Helmet

Giro Synthe vs Foray Helmet – Anyone know much about the actual performance differences (aero, noticeable difference in weight, is the locking system good or bad, etc)- is the Synthe really $200 better?

I am looking for a new road helmet and possibly a new tri helmet (currently have a Giro atmos & rudy wingspan), and was planning to get an S-works evade or LG Course. But, then, I starting looking into the Synthe (@$ 250 - more than I really want to spend)and that took me to the Foray (@ $60).