I actually have both. Initially, I bought a dual fuel stove to cover myself in pretty much any situation. High elevation, low elevation, extremely cold, dual fuel, backpacking over seas, etc. That being said, I picked up a Soto Wind Master (butane) last year and haven't used my dual fuel stove since, & don't really plan on going back to it anytime soon.
The only time that I would look at taking my dual fuel stove is if I was planning on doing more actual "cooking" with pots, pans, etc. on a canoe/fishing trip (or something similar) where weight isn't an issue. Other than that, I don't really have a use for it because it is so heavy and it really is a pain in the butt to use. Pump up the canister, prime the fuel cup, start it, let it warm up, blah blah blah. Just to much work at the end of a long day of hunting when all you really need to do is boil water. In my opinion, for backpacking/hunting, a butane stove is definitely the right choice, unless you are doing something really crazy at extremely high elevations or in extreme cold.
Also, my MSR whisperlight comes in at 14.1 oz. just for the stove itself, not include the fuel bottle or fuel. My Soto Wind master comes in right at 13.1 oz including the stove, fuel canister, & 900 mL titanium pot, so it is extremely light weight. The stove itself weighs 2.4 oz.
As far as durability/reliability are concerned, my Soto has held up well over the last year and I've heard of guys having thier pocket rockets for 10+ years with no failures, so you should be covered there.