I'm sorry but I've out crawled many Rubicons. The JK is a capable truck but it has many weak points and some serious front suspension design issues (ie track bar issues). The quality is just not comparable to the 80'support durability.
Quality's not even close I'll give you that. As for an 80 out crawling a jk... only if the jk has a poor driver. stock vs stock the rubicon is lighter, lower geared, better flex, better approach and departure angles, lower center of gravity. I'm not sure if the 80 has any advantages over the jk when it comes to 4wheeling. Love my 80, but got to give this one to the Jeep.