The Nano X has a slightly better screen - its backlight is better and it's bigger so you can slowly read anything displayed on the screen (addresses do not fit on the Nano S; the text constantly moves). Also, it has a USB-C port - a small thing which might be important for some people. I don't like having a lot of different cables.
The bolded sounds a bit maddening. Thanks for pointing that out! I'd definitely prefer a screen that displays entire addresses.
Too bad I missed those Black Friday deals. Anyone have one of those 20% discount codes for me? Shoot me a PM, thanks!
