Here is the "correct"
Guest Summary - Mobile Prototype
The numbers match up and seem to check out (no mobile); but I'm having some error where the OS details (Linux, MacOS, Windows, iPhone, Android) on the same page on the Desktop site are not adding up correct. Well, I'll fix it sooner or later.
It's OK on mobile because there is only a summary and the totals add up correctly on mobile. In the summary below I show the percentage of mobile users when compared to mobile + desktop users (no bots in this formula). It's currently (screenshot below) at the expected 10% and I'll keep an eye on this over time to see if this increases or not: