Just a point to clarify, the OP doesn't have a choice of YC CL as that floor will be closed for renos during her stay. She is asking about YC RV/WV which are the available room types. I do agree, however, that if a sofa bed is of importance, YC is the way to go.
RE OP's question, other YC advantages include a sliding door to close off the vanity area for privacy, a shower with a handheld wand, and of course the aformentioned full balcony and sofa. Also of note, I think the QS at YC is better, YC is usually the first pick-up when sharing a bus with BC, and it's closer to the boat launch. Generally speaking, I prefer the more adult, quiet lobby at YC that doesn't become so chaotic with people visiting like BC having Cape May right there.
Question really becomes are you looking for a CL experience or just the better room(IMO)? BC will give you that experience and it's closer to EP IG. With FotArts, you will have lots of fun eats in addition to the regular WS dining so CL may not be worth the $$.
We are actually staying at YC RV 1/20-1/25 so maybe we will cross paths.