I am not seeing a great deal here. Upgraded CPU (690 → 695) with 11% bigger battery, a few grams lighter and ever so slightly smaller. Some audio/video enhancements.
https://www.gsmarena.com/compare.php3?idPhone1=11522&idPhone2=10698#diff-
The CPU looks to be slightly better with a die shrink and the advantages that accrue from that. 10% bump in clock speed and A78 architecture for the main CPU units.
I already acquired a 10 iii as my Xperia X is reaching EoL after a lot of service and use, so the 10 iii it will be for me as soon as Jolla release a stable version. The 10 is longer than the X, not ideal IMHO.