WebOS seems to have the most affinity with Maemo/MeeGo, but since you'll only see WebOS on HP hardware, let's talk hardware.

The Palm Pre 2 doesn't have a compass. The Palm Pre 3 specs say compass (also for Veer?), but I think it's CPU is single core. I say sit back and wait. HP is making a good effort, but they're playing catchup at the moment and their hardware might leave some people wanting.