It is a different Yoda than released with the swamp diorama, at least. The legs on the one above appear to have brown feet, the one with the diorama has one solid color of the cream for the legs. The rest or the parts look to match each other.
Finished 75355 last night. Didn't have either of the previous UCS X-Wings, so it's still a heck of a thing to see and build the scale. Most of it is really good. The entire S-foil setup isn't as rigid as I'd expect, but I have it displayed flying straight up anyway which negates any droop