Love a good CL dilemma.
I can't really help but I'll relay my experience with a bigger birthday earlier this year. Circumstances aren't exactly like yours but maybe somewhat relevant. Given it was my birthday, I had kind of wanted to stay at a
known entity that I knew I'd be happy with no matter what (for me, Poly or CR). But we did BWI CL, mainly to give it a try, always gets such rave reviews here, the dining options around were a better fit for our plan, etc. In retrospect, I regretted the decision to try something new on a big birthday trip and sort of wish we had stuck to what we know.
I know that doesn't exactly match your situation, but I guess my point is to go with
your gut on what feels right. I usually advocate 'there will be other trips so don't stress' but birthdays are special, so we tend to put more focus on trying to make the right choice (not that that's really possible) in those circumstances.
(FWIW,
my family would vote CR for room size alone, if that matters).