I would go for the Xr as I didn’t like the X when I had it. It felt too tall and unbalanced in the hand while at the same time just as narrow as the 6,7,8 when it came to using the keyboard. I’m now using a Max but if I hadn’t got this, would definitely go for the Xr. (Upgraded from 6S Plus and 8.)
EDIT: Also you might want to take into account that Zoom view isn’t available on the X but is on the Xr. As an older person this makes a lot of difference to me when reading forums or websites in Safari as normal text size adjustments don’t have any effect. Also the Xr has dual Sim functionality, which may be of interest at some point.
The ability for zoomed display is why I chose the XR over the X.