[strangelove]

Alexander

If you dive shallow, there is no difference, or I should say no problem with a big mask, but down to 10 meters or deeper (it really kicks in a 15m with a small mask) that air volume in your mask is going to be compress (to half every ~10 meters), that lowers the air pressure inside the mask sucking your eye ball out, to prevent eye damage you must blow a little air in the mask, if you have a bigger volume mask that means blow more air or waste more air (remember the air in your lungs is also compressed). If you are holding your breath air is a something you must save.
I use to dive with a big mask my self (that was the only mask I had money was an issue then) , on the way up , when the air was expanding I would try to breath the air from the mask, it kind worked.
A bigger mask can give you more visibility to the sides, but for the last 15 years I am using a low volume mask.