They're protected, and they're 600 nominal mAh, 900 maximum, so off the cuff I wouldn't expect that to be a real determination factor.
As far as their performance, they don't have max amp, so I'm unsure.. though I do believe they're better than the lifepo's in terms of battery life.
Personally I trust in the AW lifepo's, even though they say 550mAh, it's a more accurate mAh rating in my opinion since ultrafire finds new and interesting ways to measure theirs to get more impressive numbers, not sure if Tenergy does or not. Either way, I prefer these to anything else since they continually last me for over a day per charge and if the 500 recharge cycle is accurate, I don't plan on having to buy new ones for a year since I'm not overworking them. According to what I've been told by others around here, any other cr123 setup is pretty much going to be overworked.
Basically, in my case, when it comes to a potential pipebomb in my hand, I prefer a bit more costly but statistically proven to be able to handle any setup I can throw at it.