2007 Upper Deck Baseball Forum

This and the other Predictor cards are not full parallels of the entire base set. But other such type cards are listed as parralels on the site. Some even have release notes stating they are partial parallels in the parallels section.

one bump to see if anybody has any opinion on this and then letting it go.

I DID see this thread last night (Friday), but I don't know enough about the 2007 UD set to know how these were released. That's why I didn't comment then. If all the Predictor cards were found in packs (retail and/or hobby), then I say they are parallels. The backs have NO difference from the base cards and only the color on the front and the Predictor Series stamp separate them from the base cards. Just b/c every single card isn't in these sets doesn't mean they aren't parallels. If it was a vote, I'd say parallel to base set.

I'd say parallel as well.

Also, the backs are different from the base cards (Series 1 anyways) they're the same color as the fronts (ie Green fronts and back, etc.)

Yes. Partial parallels get listed under parallel. 

After seeing Spaz's response about insertion I did a little digging. These sets were exchange sets according to this forum. 

https://www.freedomcardboard.com/forum/showthread.php/72855-2007-Upper-Deck-Predictors

As well basballcarppedia makes no mention of them at all in the pack releases.

http://baseballcardpedia.com/index.php/2007_Upper_Deck

With this info I guess they should be in "Mail In"

Well, I'd have to agree with your last line then. Definitely Mail-In.