For those of you who might have both of them, how big is the difference between the mail-away Rex and the regular retail version? With the Clone Wars, I think I'm just going to buy one of each character/figure (aside from double ups from Battle Packs), and I already have the mail away Rex and I'm debating if it is worthwhile to get the "regular" version. I might end up getting it anyways, we'll see, but I was curious if there was any big reason to. I know it is supposed to be "dirty", but I wasn't sure how different it was.