I switched to 13 pro last year, and gave the 11 pro to my girlfriend.
There is a significant difference in cameras between the 11 and 13 - especially during the night photos. To the point where, in our case, I often need to tell my gf to use my camera for a shot when we’re together, because it will
be so much better.
If you take a lot of photos then for this reason alone it’s worth to upgrade imho.