I'd take the slacker bike all day. You're going to get beat up but I'd think the slacker bike will be easier to control when you've been riding all day.
You may want to run a dropper post. I found that for my riding style I needed a dropper more on a hardtail than on a full suspension. I got "bucked" a few times by my seat being proper pedalling position.
That's my thing, though. This was a 'budget' build. I wanted a Pike, easton haven wheels, etc. But had to keep it a bit cheaper, and still came out to about $2000 for all the parts. And I want a dropper post for the Trance and Marley, heard nothing but good (maybe not mechanically) about droppers. And the bikes are maybe 2 degrees of HA difference all told. I can't find the specs for my Trance online anymore, but I think originally it was about 70 degrees, but I added a fork with 30 mm more travel to it. The Marley has a 67 degree with I think a 150mm fork, and I have a 160mm fork with a 545 a2c on it. So not too much difference on it.
Unsecure image, only https images allowed: http://p.vitalmtb.com/photos/stories/2014/08/28/full_ApexAsia_detail_259485.jpg?1409261096 Unsecure image, only https images allowed: http://p.vitalmtb.com/photos/users/109/photos/81136/s780_ApexAsia.jpg?1409258085 "The linkage shown here is designed to provide a leverage ratio that shifts dramatically from falling rate to rising rate as the suspension cycles, coupled with a certain amount of chainstay growth built into the system which causes the suspension to stiffen up considerably under pedaling. These characteristics means you don't need much in terms of compression damping to help control bob, and also mean you can use standard small volume shocks. Brian is currently looking for a brand to take the design into production."