I could have probably went TTS on my pair and I have wide feet but went .5 up for the sake staying uniform with all my other .5 up pairs. While the primeknit is much softer than the stripe pairs, the narrowness still exists in the toe box.
For me personally, I've went TTS for the mesh XR1 and glad I did. My toes are pretty much at the top point of the shoe and and this mesh material holds your foot very much like a glove.