Out of the 2, Google is more up to date with Maps and satellite views. A local road built in 2001 is still not showing on Live Maps, but is on Google. Do a search for SY234QR - you will see 2 roads on the map, but not on the aerial shot. M$ are useless when it comes to maps, just like their email services.

I had a meeting at a store in Llandudno Junction last Wednesday, and whats funny is that neither the SatNav nor Google could actually find the place properly - the Sat Nav was out by 1 mile, Google gave 2 seperate locations, both wrong by nearly 1 mile. The store itself had been there 12 years and is right opposite the train station I found it just by using a bit of common sense and heading for the town centre.