The above doesn't look much different with Scaletrax vs the Atlas-O for the elevated.
Here is a pic borrowed from superotrackdon on this interesting thread, that compares five track systems, and conveniently has Scaletrax and Atlas-O next to each other.
I think that the difference between the two is readily apparent, and makes a convincing case for heavy mainline (Atlas-O) vs light branchline trackage (Scaletrax).
