RIght, the Ks is handling this place with good wood and more air-sealing. With yet more weatherization I should be able to hold 70* in here in any weather.
Now you've got me wondering about your house. If you are generally within sight of the stove, where you spend most of your time, the Manny may be giving you good radiant heat. I can say that the difference in radiation between my Dutchwest (cast iron) and the Ks (soapstone) was significant. Even at 20', I can feel slight radiation off the stone stoves. Radiation will warm you, even though room temp may be a couple degrees lower. Now, both my stoves were cats; Maybe with tube stoves in steel and soapstone, radiation would be closer. Do
you have any theories as to why you are getting more satisfactory results with the Manny? I'm kinda with
@webby3650 here...having a hard time understanding how the Manny is out-heating the Liberty. I also think he is probably right about being able to move heat out of a steel stove faster...but I'm no scientist. That said, I think the ultimate in a situation where a lot of heat is needed, would be to have a big soaper like the PH, then put a small fan in front of it and figure out the best configuration that would move a bit of air past the sides and top of the stove. IIRC, heat will move faster when there is a steeper temp gradient between the outside and inside, and I think you could pull even more heat off the soapstone quicker with this type of setup.
BTW, you can put your stoves, present and past, in your sig if you'd like. That way, readers would be able to see at a glance what stoves you have experience with and would be better able to see if what you're saying might apply to them.
It certainly would be, especially for you at this time of year. I think they can actually tell winter from summer out there.

If you remember, Dennis used to routinely run his Fireview around 700, the highest recommended by Woodstock. I'm sure you could exceed that if you wanted to. I don't like to see my stove top next to the cat at much more than 600. I'd think the PH, with the secondary going, would get the sides hotter than what I see in my straight-cat stove, and might surprise you with some 'not-so-soft' heat.