To be honest, I wouldn't know the difference between the two. The terrain is fed through procedural erosion so any of the finer characteristics will be largely replaced anyway. The macro scale features, such as fractal mt range forms, will be preserved- that's something that procedural terrain modellers do very poorly (if at all).
10m, I wish! we are currently at 200m res- but that's the whole NW of M-E. The aim is to get down to around 25m using a set of apps written by RedRobes (member here). That's probably going to mid 08.
We've also got other routes we're looking at- using procedural zooms, etc. We'd like to get to about 2m res for an interactive terrain probably using Ogre. We're hoping to serve the terrain on NASA's WorldWind and get it into Viewing Dale.
We will be doing sections of the terrain as closeups as well for renders, there's always something going on, - so the Misty Mts could easily go higher res.
The biggest headache is managing hydrology. So far we've managed to keep the rivers in check, but it's always very difficult.
monks