I hope that people with actual experience with the Android apps running in both environments can answer as opposed to the folks that will respond quickly with "I'd never run Android apps" on my Jolla/BB10 device.

I have a BB Z10 and so far, the Android support for its UI - material design on some apps, non-Google apps - and some other games isn't bad. I can see that it's a step slower, some games stutter whereas on my Android device (OnePlus One, Nexus 9) they do not stutter at all.

It's quite easy to use some apps, like some calendars and to-do apps, as well as some others on my BB10 and the aforesaid performance issues are nonexistent.

However, I can only answer about Android apps on my BB10. I've never touched a Jolla device yet unfortunately.