Please no pro-anti helmet debates... 
Getting a Kask Mojito on my C2W scheme but with the Infinity at a similar price I wondered does anyone have any knowledge on how faster they may make you?
I average about 17mph on my ride. A friend told me you feel no aero benefits below 20mph...
I've had a google and can't seem to find anything out there that would cover the benefits of a Infinity as opposed to a normal helmet at a normal speed. Any experts out there that can help?

Getting a Kask Mojito on my C2W scheme but with the Infinity at a similar price I wondered does anyone have any knowledge on how faster they may make you?
I average about 17mph on my ride. A friend told me you feel no aero benefits below 20mph...
I've had a google and can't seem to find anything out there that would cover the benefits of a Infinity as opposed to a normal helmet at a normal speed. Any experts out there that can help?