I think the Rivendells have much longer chainstays like the earliest MTBs or ever a bit longer. So to get a similar ride, you would have to get one of the earlier Stumpjumpers, or a Cimarron. I have never seen a Hillibike in person, but I bet they are much lighter than an old MTB and that makes a little difference, depending on your espressos, if you are throwing it around on a trail.
__________________
I don't do: disks, tubeless, e-shifting, or bead head nymphs.