I agree with sprouts, two-way 1 is better. Many deck designers seems to have this urge to incorporate the suit symbols in the back design. It's not a bad thing per se, but it's been done many times before. And the suits ARE on the faces after all, so it is kinda overkill.
Nice work on this btw, it's simple and has many of the elements that (IMO) makes an attractive back design (center piece, faded background, corner pieces, no "hard" borders). Though the lines along the long edges seem a bit out of place, once you find out which one of these you're going with I would make another side-by-side comparison with and without those lines. Or maybe replace them with something that doesn't seem as out of place.