For recreational skiers anything will work, but that's not a question. For recreational skiing it really doesn't matter if your skis are 0.01sec faster or slower. So if we are talking about recreational skiing, I don't even see point in this discussion at all. Almost anything will go for this, even if it's wrong temperature range, and if it's done wrong way. Hell... even candle wax will do.
When it comes to racing, things are different. I can tell from first hand experience how things work, but these are a bit over 10 years old, since my last season on WC was back in 1998. But even at that time, there were two serious companies.... Swix and Toko, with Toko having edge most of times. There were some other smaller ones, like Briko (which in reality was more or less joke, but they made great goggles, and they had really great service guy, with who it was fun to spend evenings in bars :)), Holmenkol, HWK, Start, Dominator etc. They had wax or two, which were good or even extremely good in particular conditions, but in general, they were not my choice. But choices were made based on 100s of test runs, and quite few years of experiences.
Nowadays, I admit I don't have first hand experiences anymore. I don't test anymore, I'm out of service business, but I still have so much of this in my blood, that I still find it interesting to talk about this, and get some info from top guys, even though I will never need this info anymore. Considering few of my best friends include service guys of some of top 10 WC racers and WC techs of wax companies, I guess I get at least some info. Sure it's not same as testing on your own, but for getting general view, it's enough. So from there comes my info. Is it a fact? No, but it's pretty close. ;)
PS: I couldn't care less what someone is using. If someone is using Briko, well it's fine with me. If someone else is using Swix or anything else, it's also fine with me. I sell photos of skiing, not ski waxes, so I don't get any profit out of my "suggestions". Both Swix techs on men and women WC are my really good friends, but that's all "connection" I have with Swix, and their salaries won't get any bigger if every single person reading this will go and buy entire Swix collection. Yeah, I use only Swix nowadays, but simply because I get it for free :) And for recreational skiing, that's good enough reason... at least for me ;)