I got a pack of 2011 Topps Chrome in one of those 12-pack Fairfield repack boxes. First out of the pack was this.
2011 Topps Chrome Heritage Refractors #123 Brent Morel
There was nothing special about the other three cards in the pack except that I had the regular Topps version of each card. I scan a lot of cards and put the scans in a Filemaker database. If i switch back and forth between the base version of a card and a parallel version I can get an idea of how well the cards are centered, at least in reference to each other. Centering is a big deal in card grading, especially in earlier cards as apparently cutting big sheets of cards was prone to errors. How many times have you seen a perfectly acceptable Topps card from, say 1975, that had most of the border on one side sliced away while the other side had a border than went on forever.
Apparently they have gotten much better at this from what I can see when comparing cards in my database. It occurred to me that I could show this with an animated gif, if only I knew how to make one. With the help of my talented daughter, we figured out this was absurdly easy in Photoshop Elements. The only thing that would work right was the timing of the loop. I tried to lengthen the loop but Elements wouldn't pay attention to me.
Anyway here's the three Topps Chrome cards along with their Topps base.
This last one is interesting. I've noticed that Topps doesn't always use the exact same picture for these parallels. I've seen also when comparing Topps to Topps Opening Day. Sometimes they use an entirely different picture. But some times it's just cropped differently, like this one.