I would say production wise Xscape is by far superior.
Michael has 6 great songs. HMH, HT, BTM, AD, BOJ and MTS. - Much Too Soon is my favorite. HT and BOJ shares the second spot!
Xscape has 8 truely great songs IMO. - I did not like DYKWYCA at first - and BG seemed weird and cinematic at first - but only because I had heard leaked versions. If I had never heard leaked versions I would be over the moon with exitement. - Still am actually.
Loving You is my favorite from the album, it's perfect. Sweet, simple, pure - MAGIC!
Chicago - never heard this before - truely a great MJ song.
LNFSG - I had heard the demo and was sceptical - but WOW... - Amazing song - the duet is the best production wise.
STTR - third best song after LY and Chicago.
Xscape, BG and APWNN - 3 great songs. - I like the new versions just as much as the original versions - maybe even more!!!
and DYKWYCA - maybe the only song where I really prefer the original. - But still the new version is still good.
And Xscape had demos and a DVD with videos. (even though the DVD was absolutely crap IMO...)
Bus seen as a release Xscape wins. - Just the fact that there was no debate about vocals makes it a better release. "When in doubt - keep it OUT !!"