Sony may have paired the Xperia 10 III with Qualcomm's Snapdragon 690 chipset, according to a new leak. The Japanese company appears to have a Snapdragon 875-powered handset in development too, which could be the Xperia 1 III.
https://www.notebookcheck.net/Sony-s-next-mid-range-Xperia-smartphone-will-have-a-Qualcomm-Snapdragon-690-chipset-Snapdragon-875-being-lined-up-for-Xperia-1-III.505022.0.html
These companies' naming conventions are so confusing. 1 is the top-end model and 10 is the mid-tier. Seems backwards to me. I wonder if there's some logic behind it, maybe based on Japanese culture, like how OnePlus skipped 4 due to tetraphobia. Probably just somebody in marketing not thinking it through.
It could be coming from competitive sports, where position 1 is the top, and the higher number means a lower ranking. Most DSLR manufacturers use a similar approach (including Sony, with some exceptions). And the 2nd number is actually a revision/version, so that goes up with generations, hence higher is better. Like "Xperia 1 iv (reads Xperia One mark Four)" would mean the top of the line product at 4th generation.