Who the **** cares who produces which statue, the point is getting the statue you like best and want for your collection. Turning it into a fanboy debate when they are all making some beautiful statues is just ridiculous. We have different tastes, and should be praising the competition anyway.
As for me, I like XM, and I also like SSC. However, I can only say that for me Hawkeye, Wolverine, Magneto and Ant-man are the XM statues that really stick out. For the rest, there's some issues I'm having and other companies making just as good statues of the same character. Then there's also the money aspect. Obviously XM statues needs to be a bit better when it costs double of other statues.
So like with Thor or Wolverine, I'm going with SSC because I can't justify paying more than double (with taxes and shipping) for them when I like the SSC ones more or less equally (I like SSC's Thor better, and XM's Wolverine a little better but also love SSC's). I'm getting Hawkeye, though, I find that extremely much better than SSC's, and I'm sniffing on Ant-man, awaiting to see if prices drop and if SSC comes up with one soon.
Just get what you like and let other people get what they like, we don't need to agree on everything..