Enters discussion on egg shells...
I'm an incredibly happy Froling owner so I'm biased, but I will give my opinion and answer any owner operating questions you have. I don't talk\discussion efficiency etc., but tend to focus more on convenience.
I honestly believe the Froling Lambda type boiler is as close to "conventional" heat source convenience as you can get. It is incredibly easy to start, and it manages itself. Other than setting boiler set point when you first set it up, there is not much more to it than that. I'm not argumentative by most means, but I always get a kick out of the "that's just like my boiler" posts that then go on to detail some pretty involved lighting steps in my opinion.
I am not an expert by any means but I think it safe to say the boilers have a different "approach" so to say. The Froling is obviously electronics heavy with the main computer, variable speed fan, automated primary and secondary dampers etc. The computer will modify each burn to ambient conditions and load. It is also induction based, whereas the Econoburns I remember when I was researching push air I believe? Someone more current can chime in. I find the induction based fan makes cleaning and reloading mid burn cleaner for the surrounding space.
I have 6018 hours on the boiler and I burn year round (all through the summers yes) for all my heat and dhw. I have had to replace 1, $8 capacitor since I owned the boiler. I may need to replace the refractory in the next 2-3 seasons I would estimate. I burn everything (even pine) except for Oak which doesn't seem to easy to come across - this may attribute to the way my refractory is holding up.
If I can answer any specific question, please let me know.