I use both, and Google's nav is superior IMHO.
& I'm not a fan of any particular OS...
I have also been using both regularly and I definately like Google better.
I use what ever my HD2 is runnning at the moment as I've been dual booting.
Google.
- map navigation is just like a regular GPS as you are always seeing straight of where you map is going.
- the maps look much better than Bing.
- the TTS package that was recommended for Google map is not very good.
Bing.
- The maps are always lay out in a N, S, E, W format. Pretty sure Bing is working on it to where you are always looking straight during navigation.
- The TTS is perfect.
- maps not as pretty as Google.
- I like navigating through Bings than Google maps.