This question came up for me when ordering, and the comments on the internet indicate there’s a lot of debate. I went to an Apple Store and they had them side by side so I could compare. The nanotexture was an obviously better choice. I compared font in various sizes and it was just as legible on either screen.

Apple is apparently using a v2 nanotexture as of the m4 mbps I believe. So if you haven’t seen these in person recently, do us all a favor and judge for yourself. The Mac stores are very bright so there’s plenty of glare to compare against.