I hear you. I'm more and more tempted to build a chiner fat bike all the time. Problem is, I've never ridden one and am wanting one bc they look sooo ridiculously cool
Since you already have the Mukluk I say definitely sell it... You obviously like the fat bike platform and the carbon chiner will be a huge upgrade for you, especially if you get some nice wheels to go along with it - and it looks like you are.