Comfortable Foam, Price, Rage of Vision, Snap Lense
Not as much neck protection
I recently bought the mask and I am impressed with it in several areas. First the visor easily snaps on and off unlike the Flex's and it is also low profile. The foam is the same as in many of their mask and is pretty comfortable. I am very happy with how the mask rest on your face and head. Some of the other mask seem to be in a constant falling off you face and having to readjust the headband. Fx seems to let the mask rest on your nose and the strap goes higher up on your head so it doesn't slip as easy. The chin strap is not bad you can use it or remove it. Now the feature that is new and pretty cool. The quarter turn removal system is cool, not quite as easy as I had imagine but easier with practice. The lens is held in place by a oval piece of plastic that rotates to lock in or allow the holes to slip over. The only hard part is when you put the lens back in the mask; I found it necessary to bend the tabs outward slightly so that the holes would slide on easier. I used a plier's, the tabs are tough plastic and very durable. I think these are a very good system and one of the best I have used since I have been playing.
If you are looking for a new pair of goggles with the snap turn these are nice.