How does the Airport and surroundings blends with FTX Global/Vector! (Colour,...)
We only test a scenery with the default. And of course, that's the main reason why we prefer to stick to the airport property perimeter only, not doing too much outside it: for the precise reason to reduce the chance of conflict between 3rd party products.
Of course, KMEM being sold as a Try-before-buy product, allows you to check for yourself how it works together with 3rd party scenery enhancements.
I believe there are some things to do with FTX Vector installed (run the configuration tool. Sorry not being more specific, but I don't have any of these products installed), but that's probably true for every airport scenery you install. There are some posts in the forum about this.