Chosen Solution

I have a s6 edge and a s6 edge plus, my idea is to put the s6 edge motherboard on the s6 edge plus, is that possible?

nope. my company is a samsung authorized warranty center. i open these things up on the daily. the boards are not only different layouts, and shapes, but also have different connectors on the inside. no two models of phones have interchangable parts. (Save for the iphone series and their “S” counterparts)