I replaced my Grillz with a set of (1st generation) Profits last April during the England vs Scotland game to due serious fogging problems with my Grillz.
One thing i never had issue's with while wearing Profits was fogging in fact i would say they had some of the best anti-fog lenses i have ever used even when wearing them for extended periods of time,the only annoying problem i found while wearing them was the thicker ear foam which the 1st gen model had which made hearing difficult at the best of times and i actually ended up cutting the foam out of mine in the end and it made the world of difference.
The newer models now come with the thinner foam ear pieces which i believe has resolved most of the hearing issues associated with the earlier Profits.