I'd certainly like to slap Scott much more than Mark.
All joking aside, and seeing as I seem to have started some controversy on this thread. I fully respect Scott as both a teacher and a musician. He's just not to my liking, which is purely a personal thing and most likely much more a reflection of me more than him.
I find his videos extremely irritating because they're basically just click bait to attract people to his site. Although I'm sure his actual paid content is much better, based on the feedback from people on this site. I do actually much prefer Marks teaching style which is much more direct and to the point.
Also from what I've seen of Scott's videos he seems to be extremely passionate about, and focused on jazz, which is fair enough, but personally I'd rather listen to roadworks.