Bed Rug Mat fitment

So Ive got a 2015 Access cab sport and wanting to put a bedrug mat, just the mat and not the whole liner into the bed. Bedrug has a model for the drop in liner that requires drilling which I do not want to do. It looks like that model might be flat on the underside (side that lays against the liner which to me might feel weird when sleeping on) And the other model that's for the spray in liner or no liner appears to have grooves that line up with the groves in the bed. Will that model match up with the liner that's stock in the truck or is the fitment off? Does anyone have pictures or had the same question when getting the mat?

It will have a shell on it so it flying out of the bed wont be an issue with not drilling it in and I think the model for the spray in comes with velcro anyway.