DarkWombat,

No, there are several new changes. I had found a site that showed what has changed, but I can't seem to find it now. Here's a link to DeeTee's site with a description, but they're leaving a couple of things out I think. One of the main upgrades is the tail control set (see pic). The ball links swivel, which cures the binding that was occuring to some.

Of course you'll be able to upgrade the XL...

http://www.deeteeenterprises.com/NS....50SE.Specs.php

Sorry for the of topic guys.