I replaced, sort of, my 2005 Surly LHT with a 2011 Waterford Canti-Sam. I rode up and down the West coast and then across the USA on the Surly. I got the Sam as a Country Bike to complement the LHT (this was to remain my loaded touring bike).
The Sam ended up being my dedicated touring bike almost right away. It handles whatever sized loads just fine and is significantly stiffer in the BB, which is important to me as a heavy rider. I have done some 2 day tours and some 2 week+ tours on the Sam and the only thing I noticed was some front end wiggle on descents, fixed with setup adjustments.
Then in 2017 I finally got my dream bike, a Waterford Atlantis, which is now my touring, etc. bike, but the Sam really can't be beat and I wouldn't hesitate to ride it on any length tour shy of full off-road touring.
The LHT has been a frame and fork hanging in my garage for years now. I don't imagine I'll do anything with it, but I have so many memories with it that maybe someday...
For what it is worth, my wife has an Appaloosa, and it is awesome! But I would consider it more of a long WB, long TT Atlantis type bicycle. Not my thing, but she loves it. It is stout as F*$K!