Another thing is the sharpness of your edges. Your high-res mesh has sharp, hard chamfers whereas the cube bake you're trying to replicate has rounded, soft bevels.
Cheers m4dcow. That did the trick :) @jarjaniks Here's what I mean by a synced tangent space workflow. Hopefully the pictures are clear. Bear in mind that I only spent about 15-20min on this from modeling to baking. :) When the tangent basis is synced(Mikktspace in this case) then the target software computes the tangents…
First off, let me start by thanking all of you for reading and replying! I really appreciate it! @JEDTHEKRAMPUS I don't actually know. I am just exporting from 3dsMax as an OBJ with texture coords, normals and smoothing groups checked, and just putting it into Xnormal. If you could elaborate on how to do it and test with…