i have one, it is not the same as the invision. i prefer the invision a little bit more. (wieght of the invision alows it to take the gold)
-The proto is by for the comfiest mask i mave ever worn, it has lots of really soft foam and beats the invision in this division.
-The weight is an issue, The proto is quite a bit heavier then the invision and though it doesnt seem like that big of a deal, once putting on the invision after words you will notice it.
-Ball breakage: the proto has a very soft rubber on the lower part of the mask (Jaw), which helps with ball breaks. I, however have not bin shot there yet and cant tell if it works or not, but i imagine it would work. The invision is hard all over and balls will break if hit in the mask (there are exeptions).
- looks: even though the proto looks pretty good, it hasa flaw, the jaw looks like it sticks out to far. it still looks good. But the invision defintly beats it in the looks catagory in my opinion.
-LENS: both lenses are exactly the same, though not as good as the profiler, they are both VERY clear and great fog resistors.
These are the main differances between the two. If i have left somthing out, PM me and ask a question, i will try my best to post what i know in here. thanks.