I tried a Nexus 7 and didn't like the stock experience. I use the built in OTG support Touchwiz offers, I like to be able to change my fonts on the fly. I didn't realize things like this were Touchwiz until I used the Nexus. That's just me. So, the Moto X's display is better to you because the Moto X doesn't have Touchwiz? Did I misread that? I must not be a power user, I don't do anything that allows me to notice the lag so many suggest my S4 has.
However, my question was in regards to display quality amongst the aforementioned, not opinions on lag. I understand the S4 is not a popular device here but every question comparing any aspect of it shouldn't need to mention lag which many have never seen.
Note 8.0