I think I'm pretty qualified to answer this. 99% of the guys I ride with are on the 43 SX Stickies, many are from the bouncer crowd, one guy runs the Treps, and I run Krawlers and have for years. Here's my thoughts.
The only things the Krawler gives up to the SX is ground clearance and sidewall toughness and frankly I don't think the sidewall toughness is as big as everyone makes it out to be. I've seen a lot of SXs cut that made me scratch my head. I've only ever cut one Krawler out of years of running them. A lot of it has to do with air pressure. Krawlers like more air pressure.
Anyone that says Krawlers don't work in the wet muddy stuff read that **** on the internet. They EXCEL in the wet muddy stuff. Not talking about bogging, who the **** does that anyway. But give me wet snotty rock and nasty dirt hills and I'll eat that **** up for breakfast. All day long.
The SXs are heavy as ****, so take into account your gearing and HP and driving style because there will be a difference.
The SXs are quite a bit taller than the Krawlers which means more sidewall which means more give and a little better ride. You can run lower air pressure and still hit **** harder because you have that cushion. If bouncing is your game get the SX. I beat the piss out of the Krawlers but I don't close my eyes and floor it and bounce off every rock either. In that case you need the extra height and sidewall cushion and toughness of the SX.
The Treps are a good tire, may be just slightly smaller than the Krawler and the sticky compound is not as sticky. I'd run them but they'd be my third choice behind the other two.
Krawler red label compound kills the SX sticky compound. If the SX was a 39 or if the Krawler was a 43 (ie level playing field) the Krawler would **** the SX in the ass.
