One other factor is whether you ride-to-ride or you unload your bike off the car at the trailhead and are on dirt almost immediately. I have recently had the pleasure of new bike day that included stock Assegais front and rear. Very nice tires but, geez, that rear sure is a slow rolling anchor on the 25 minutes of asphalt/gravel-under-powerline/path spin up to the base of where the trail network starts properly. Once on dirt I don't notice it too much but from a practicality stand point, something that rolls well yet still has some side knobs is appreciated.
I used to run the Aggressor front/rear and I actually thought they were pretty fun (fast rolling, a bit drifty but predictably so and thus kind of fun). I've got a new Aggressor on order to run as a rear and will keep the Assegai up front.