I had heard 10 speed chains last longer than 11 speed, I just read an article that the 11 speeds chains are built to tighter spec and tend to start less stretched and therefore should last longer.

I have bikes with 10 and 11 speed drivetrains, but I don't ride the 11 speed enough to gather useful data

Anyone have real world experience with this?
Anyone running 11sp chain on a 10 sp system?