Cover Couple

The same stock images are sometimes used on the covers of different books. In Cover Girl Coincidence? we posted about three different books that all have the same girl on the cover. This time, it's the same couple who appears on two different covers, The Kiss Test by Shannon McKelden and I Only Have Eyes for You by Bella Andre. At least in this case, the image of the couple was flipped, so the man and woman are on different sides. They made some effort to make them a bit distinct. And of course, the lower half of both covers is designed differently. But what do you think? Are these covers dissimilar enough so that it isn't a big deal that they have the same couple? Do you think publishers should go with illustrated designs instead so each cover is unique?