My "primary" all-things/touring bike was formerly an LHT (actually two, I started on a 56cm and traded to a 58cm), which I replaced with a Sam Hillborne, which I replaced with an All City Space Horse Disc. During the Sam Hillborne days, I brought an AHH into the bike stable.
1. The LHT was a fantastic touring bike that handled well with medium or heavy rear loads, medium or heavy rear loads and medium to heavy front loads, and did not handle well with front loads only. I thought the LHT handled well as an unloaded or lightly loaded every-day commuter and weekend adventurer, but I didn't know what I didn't know... until I rode my Sam Hillborne.
2. The Sam Hillborne handled similarly to the LHT with rear loads and rear + front loads, but also managed to ride fairly well with light to moderate front loads only (though this has never been my style for carrying stuff), and performed significantly better, IMHO, than the LHT when unloaded or lightly loaded. I'm 6' tall and float around 215 lbs, which to me says I have enough weight and oomph to awaken stouter frames, and not all folks will have the same experience with the Sam. I thought the Sam would suit me for spirited unladen rides, until I rode the AHH.
3. The AHH handled medium/medium-heavy loads on the rear or light/medium loads on the front, or a combination of the two, but as weight crept up into touring load range. it took a bit of getting used to managing what initially felt like a bit of confidence-busting squirrely handling. My experience with heavy tour-like loads on a variety of bikes, is that regardless of how odd they may initially feel vs. everyday riding, I can sync up with the nuances fairly quickly. The AHH outshined the LHT and Sam for lightly loaded or unladen spirited riding, over an array of road and road-like surfaces. I decided to sell my AHH because it was arguably a touch small for me, and I was in pursuit of simplifying my bike stable, looking for one or very few bikes to rule them all.
I would not put the LHT in the same category as the AHH. I think the LHT is more comparable to the Atlantis. If you're interested in carrying light to medium loads (which IMHO your 10-15 lbs. commuting load falls into), on the front or rear of your bike, on the road or non-technical mixed terrain, and it suits your budget, I think the AHH is a superior choice. If you think you may want to carry larger loads more regularly, I think you'd still find improvement in ride quality over the LHT in looking at the Sam Hillborne or Joe Appaloosa.
FWIW, I think the only bike that I felt like I sync'ed up with immediately was my Sam Hillborne, and I own or have owned other Riv bikes - the aforementioned AHH, a Romulus and a Rosco Bubbe v2 and I've spent time on a borrowed Bombadill for a handful of weeks.
-Jeff
Silver Spring, MD