Each of them explains their rigorous “vetting” process and subsequent “qualified” picks, and, while the same platforms do show up on some of these lists, the rankings are never predictable.
It really boils down to how much you want to spend, where and how you want the book distributed, how you want to treat your copyright permissions, and what kind of backend reporting system you want.
I’m not going to list the various features of each of the platforms (that’s what those “Best Of” articles are for). What I will do is tell you why I chose the platforms I did.
Hope to see you there!