Current trends show that a company either has to develop an app or has its solution look like an app. As you can see, both AdoramaPix and Snapfish passed that test. If you prefer a better variability regarding covers, sizes, themes and so on, then AdoramaPix is your choice. Furthermore, the company allows uploading PDF files, adding QR codes to your books, and offers all kinds of coupons and discounts to reduce the total to a much cost-friendlier price. On the other hand, Snapfish has the trendier interface and a way better selection of complementary, especially embellishments. Other than that, you can order your books with layflat covers, enjoy a wide variety of coupons and discounts and ask for help 24/7.
In other words, this is a choice between trendiness and better variability. Only one thing is sure: with these two photo book editors there is no bad choice.