I’ve never ridden the Bontrager, but I’m a big fan of the Big S line. Purgatory is a great tire, and it sets up tubeless in a snap. I’m on a Butcher / Ground Control, and it’s great for Northern Utah riding. I’ve ridden the Kokopelli with this set up and have never had a problem. I use the grid line (thicker sidewall) to reduce sidewall cuts.