SUP Bailey, value-wise both these boards are "on the money".
They do have distinctly different outlines - so it will ultimately depend on where you will be using your board most.
The SUP ATX 10'6 PR has the new LiftSUP handle which offers some advantages over the ledge style handle. This may or may not be important to you.
Other than that it will probably boil down to you preference on the graphics.

SUP ATX PR 10'6 x 32 x 4 1/2 175L
For sure, if you want to get a Naish Nalu GS 10'6 as well with bag and paddle, you will save some money.