Which do you choose? Which SHOULD you choose? Is one better?
The answer: it's your choice. No, really! As with much of cloth diapering, there's no one right answer, and the one you should get is based on which one works best for you and your baby. And in the end, many people have a mix of both.
Aplix generally comes in one configuration and almost always allows for crossover tabs (center diaper). The only diaper brand I can think of off the top of my head that is aplix and has a different arrangement is gDiapers, which velcros on the side and doesn't allow crossover tabs.
So many kinds of snaps! And one velcro.
Middle: ones&twos AIO. Clockwise from top: Kawaii GoodNight Heavy Wetter, Applecheeks, itti bitti, FuzziBunz, BumGenius Elemental, GroVia AIO, Swaddle in Cloth fitted, Goodmama GoodNight fitted
Snaps come in as many configurations as their are diaper brands. Some have crossover tabs, some don't. Some snap in front, some snap on the side. Some are arranged in a vertical row, some are arranged in a horizontal row, some in a triangle, some in a square, some in a parallelogram (I was going to say just kidding about that last one, but there probably really are snaps in that shape somewhere). What does this mean? It means that if you don't like the way one diaper snaps, try a different one. Each snap pattern fits a different shape of baby differently, and some fit certain babies far better than others.
Crossover snaps on a Goodmama
Aplix and laundry tabs on a Blissful Booty pocket diaper
My personal solution to the old "snaps versus aplix" question is to have a variety of both. I have a number of aplix diapers that I save for babysitters and my husband and usually take these on the road with us (they're great for showing people how easy cloth diapering is!). I also have a number of snap diapers that I use, both because I like the fit and look of them, but also to last us longer and to be used when/if she figures out how to undo velcro.