All you need to do is a search for 2007 Ultra hobby vs retail. There are a few discussions there of the differences between the sets. It looks like the hobby versions have a shiny holofoil silver and the retail versions are a flat non-shiny silver foil. It's likely not that apparent until you have a card of each type in hand to compare. Scans just don't pick up foil and holofoil well.
Either way there are 26 members that have specifically clicked through to get to the retail set and entered cards there as part of their collection. Most of those have cards entered both in the main set and the retail set, so they are seeing something maybe you aren't. No matter how subtle the difference, there seems to be 2 distinct and different sets of these cards.
Looks like now maybe you have some more cards to add to your wantlist!
My Autograph Collection Website Emphasis is on the 1969 Cubs. This is still a work in progress as is my collection here at TCDB.
Value what you collect, don't collect for value.
