I've watched that and I don't know whether Roger failed that hill on the non-pro S16 due to the motor giving out or not, but I believe it also had to do with Marty's less-than-ideal pad placement on the S16. As you probably know, Roger is very peculiar on pads placement.
I've seen the 2cells1pack dude with the Kingsong team do some very convincing hard trail riding in the mountains on the S16 Pro.