It looks like the packaging is not the only difference.
If you look closely at the Costco version, below "Replica Game Ball", the lettering reads " ---Moisture Absorbing Cover---" followed by the bar code.
Those seem to be missing from the Target version. Also, the Target ball seems to more of a bright orange color, even accounting for the differences in lighting.
Anyways, thanks for all your hard work and efforts. Every time I take a photo of even one product at a store, I feel like a criminal -- so you guys must have guts of steel to do the work for this site!