Can thick diapers absorbs much more than a thin diaper?

Put one of each on, soil yourself, and post some pictures. Then we can make that determination.

If both are constructed of the same materials, thicker should absorb more, and also do better at wicking moisture away from the wearer’s skin.

Logically speaking…yes. However, with the new absorbent products on the market today, that might not actually be the case. At least that’s what the commercials want us to believe!!!