I never had UTX, but I think that it did a bit of everything, all at once.
Ultimate Terrain X for Microsoft Flight Simulator XAccording to them it does roads, rivers, coastlines, railroads, etc.
And that's what Orbx Vector does.
But Ultimate Terrain also tries to do everything else too.To me, it sounds like a great program, and it only costs $35!
On the other hand, it looks like Orbx is breaking the world up
into different groups. AND THEN subdividing the earth into more sub-groups so that they can give each area much better detail.
Needless to say, the more detail devoted to different areas of the world, the better it'll look. Especially compared to a generalized program.
Unfortunately, all that extra data will raise the end cost.