Here in Europe, the Araucana standard is different - they allow tails, and the muff/beard that Ameraucanas have, that's why there are no Ameraucanas here. I have a few with both tufts and the muff/beard. The gene for muffs is the same as for beards, and separate from "tufts". Your chick looks more like tufts, to me. As far as I know, muffs is the same as bearded, and you would not have one without the other. It is incompletely dominant, so a heterozygous Mb/mb would have a smaller beard than a Mb/Mb. It will be more clear when the chick feathers out more, but at that stage, my muffed chicks had pin feathers emerging all around the chin and ears, fairly evenly, and the neck develops a fullness in the feathers as well, making the neck look thicker than your chick's. It's hard to tell sometimes because tufts come in all sizes, face all different directions, and can be found in various locations around the neck and head. At least from your picture, your chick looks like it has tufts that point rearward, and blend in a bit with the other neck feathers. But I see 3 distinct feathers that stand out from the neck. In what I've seen of muffs/beards, you don't see feathers stand out distinctly like yours. Yours could have both as well, I think at that stage, the beard didn't really show. I believe the muff/beard feathers in later than tufts.
I have a young cockerel with both tufts and muff/beard. The features are quite distinct and separate.
Here is one of the muffed Araucanas, as she's feathering out you don't see much, but she ended up with a full muff/beard and much thicker neck feathering.
I haven't seen a lot of tufted chicks, but Lanae your chick looks more like tufts to me, or, as you say, HUGE muffs.
