My main ‘text’ issue with the XR is that the standard size text is smaller than that of the XS unless you use Zoomed display mode. Adjusting the Text Size doesn’t affect text in apps like Safari.
I never noticed that until you mentioned it.
I've been in a quandary over XR vs XS (or $29 battery replacement vs. trade on my 6+) and found myself at a non-Apple store with a display that actually allowed side-by-side comparisons, something not possible with the separate tables at Apple stores.
On Safari, displaying a site with minimal styling (Macintouch), the text on the XR was actually larger.
Of course, the XS displays less information overall, requiring more scrolling, but I was aware of that.
I'm not sure what the cause/reasoning is behind the difference in text sizes, but it added yet another factor to consider.
As an aside, I also noticed the much warmer screen on the XS, TrueTone on or off. I generally prefer warmer rather than cooler temps, but the difference struck me more than any difference in text sharpness (which was minor to my eyes).
One of my main motivations in getting a new is the desire for something physically smaller. The XR wins a lot of logical arguments, but the only real size difference between it and the 6+ is that it's slightly shorter. If there was a smaller version of the XR, the decision would have been easy, but Apple being Apple, their product structures are often well-suited to goading people to choose the costlier option.