Thanks for the links, Jayson. It looks like the version that's coming out individually is the more accurate of the two (the detailing on the where the cockpit viewport would be is different and the one in the BP may or may not have the triangular lines under the CIS logo on the "shovel" section of the tank), but the one in the BP actually looks quite a bit more detailed and realistic. The blue is a lot deeper and crisper on the BP version as well, at least from the photos.
If the UBPs are as easy to obtain as they were last year (being that Target actually has a lot of them for at least one week and has a set launch date for them), I'll probably just end up springing for the UBP. I can always stick the extra BDs inside the tank. The fact that the Clones are the version from the AT-TE with the little shoulder logo makes that a little more tolerable as well.