16K map seed = Metropolis ( I have yet to see a map with this may POIs , you can hardly find a spot on the map where you can stand and not see a structure. The amount of buildings on this one is cray-zee. You could turn off loot respawning and it would take you forever to clear it all out. ) The same Seed on an 8K map is horrible and unplayable.
Yeah depends on seed i think, some appear the same as 8k but more spread out. Metropilis seems to scale up nicely, not that many do. One of the quirks of rwg it seems.
Piss Off is another decent one with a good biome spread too and a couple pois i've never seen before, 8k maps are just too small when you get to vehicles.
Decent 16k maps are few and far between ,Metropolis and a few others being the best of the bunch. Really hope rwg gets some love in the next update.