A friend and I are both using UTX and FTX Global BASE and Vector (in multiplayer together, too). It took a bit of playing around with priorities, but I'm using the FTX Vector roads while my friend is using UTX roads (within the U.S. of course). We both have all of the North America regions, too (except SoCal which just came out -- will get it soon). It generally works well, except that on some of the airports I've modified with ADE I have trees all over the field, including on the runways, taxiways, etc., depending on the specific landclasses in the area. Everything else is great.