Hmm, would that be under User Settings > Item Properties > Enable New Item Properties Layout?
If so, I am not sure I understand how the comparison appears.
it's quite easy to understand:
each property has a symbol on the left and the symbol indicates the difference with what you are wearing.
Green arrow up: you gain/increase that property
Read arrow down: you lose/decrease that property
Equal sign: the property is the same
Gray diamond: the property is a description or has no effect.
On the right of each property you see the cap and how much you gain/lose in number.
That's pretty much all you can achieve in this game as comparison
