Well firstly it won't be one of a kind it will be one of at least 500... Lol. Secondly, you are assuming that the SSC Spiderman will have a huge ES, but all of SSCs ESs, save for the DC Trinity, have been rather reasonable as of late.... So that could be a bad assumption. As for a leaning issue that is really not something you can %100 say WILL happen on the SSC piece and say for sure it won't happen on this on from XM. Now IF when the 3D render do ES out you love this one then by all means say that, but it doesn't have to be 1 company over another, it is simply a preference thing. As for the XM DC license that horse is DEAD for now. They aren't even TRYING to get it.
Depends on what you consider 'reasonable'... Iron Patriot's 3500 ES and Mk 42's 3000 ES exceeds reasonable imo considering they can't produce 5 that aren't a disaster.
Too bad about DC though, would love to see the XM takes on their characters.