Protection-wise, AA's guard is kind of sketchy, I will agree to that. The part of the guard that actually covers the top teeth, I'd guess is just over half as thick as mine.
But come to think of it, his regular yellow guard that he wears 99% of the time in training is pretty thin too. It looks more like a guard I'd use to roll with. Probably not the best choice for a HW fighter who's chin has never been compared to Mark Hunt. Oh well.
As for anyone here trying to track down and use a guard like Andei's; I wouldn't advise it, if you like your teeth, and the inside of your mouth. I know who his Dentist is, and I know a number of guys on Team Pitbull. I could get one if I really wanted. But sporting the fangs of a "copy cat", and compromising my safety... just isn't worth it.