2008 Diamondback Sortie or 2011/12 Specialized Stumpy FSR?
Made a decision.
Changing the fork and getting the diamondback repainted would probably get you to at least the same price as the stumpjumper. Ultimately you have to weight what is more important on you list if priorities. I recently rode a new full suspension stumpjumper and was very pleasantly surprised. Very nice bike.