It actually is based on the character shown on the bottom corners, there are 4 sets, and not every player gets the same set.
http://flowerknight.wikia.com/wiki/P...rest/Card_Flip lists the possibilities available. The different sets all have the same contents on each card, the contents on them are just ordered differently. Lady Sorrels' set does seem to be the more common version. I suspect that's caused by the flakey randomizer. Don't ask me why, but I strongly suspect the randomizer in several Nutaku games not to function properly. I'm not saying they're rigged, but just that they don't function properly and are prone to give repeat results.
Maintenance in 15 minutes, redeem your final cards quick!
Flower Knight Girl ID - 522072974
Not only redeemed my final cards (I only had 3* girls left to clear, sold them all), but also did just enough runs of the event maps to get the jewelry materials from the event daily.
Gladly, the new event will also bring necklace materials, since I have two necklaces to level.