I went back and forth between these two for a while. In the end went for the Canyon (and got a good deal on last years Strive 9.0SL through their outlet). If the Wicked 160 Ltd would not have had such a long waiting list I may well have gone for that.
more established brand
frames look better thought out and finished (couldn't help thinking the YT was just a cheap copy of a LaPierre)
have a 'UK service centre'
better value (their BOS bikes are incredible VFM)
frame design 'influenced' by one of the most successful AM bikes of the moment
Sizing also seemed to fit me better in the Canyon. Hard to get a good idea without sitting on one in the flesh, but through my trawling of numbers and pictures I decided the Medium YT was too long for me (and the Short too short). I went for a Medium Strive even though the online fit thing told me Small.
Also at the time I bought mine there weren't any decent English reviews of the YT: seen a fair few recently which have all been very positive.
I'm very happy with my Canyon. Can't say I've fallen in love with it, but that's probably more about me and my riding at the moment than the bike.