I'm going to add my very limited $0.02 here. And I mean limited....

I've only owned two different muzzleloaders.
MOST ACCURATE: Definitely my Encore Endeavor. Being that the only othermuzzleloader I've ownedis a Remington Genesis.
FAVORITE: Encore Endeavor. Everything about it screams quality to me. I haven't fired a lot of other muzzleloaders but I have handled them and the Endeavor just feels better and the components look like they're made better. It has great balance and the trigger is awesome. Honestly, if I had a professional gunsmith offer to tweak this rifle for free, I would pass. Absolutely NO blowback due to the superior breech plug design and very accurate.
WORST: Remington Genesis. Not that it's a bad muzzleloader but I've only had two and one has to be the worst. The trigger needed tweaks to make it smooth and I did them myself. It had some blowback that would accumulate on the scope but not a whole lot. Pretty accurate but not as accurate as my favorite.
I'd really like to get a Knight some day and give it a go. But it's going to be a tall order to out-do my Endeavor. But I'll remain open minded.