Good questions. BTW, I was trying to check the ladies out, but did not want to stare too muchI
For pretty face, Marilyn and her high-fashion makeup stood out. Also tall and thin and polite. But I was worried that I was not "hot" enough to turn her on in session. If you got high confidence, go for it.
For boobs, new Fia stood out. Cute Round face as accurately described in her posted spa blurb. I did want to check out her figure more, but her clothing may have been covering a fair amount. (Lucy, in contrast, wore a sports top that showed off her nice legs and bum etc.)
Crystal was a spinner type, Thin. As she looked me square in the face and gave me a big confident smiled when she said hi, I did not want to be cheap and obviously check out her cup size. Smaller I would assume, but may still look cute in the buff given her small frame. So to be determined.
Overall, just based on quick surface appearance only, I would say Marilyn was more DDG and Crystal more GND, with Fia somewhere middle that day (as she was not all "dolled up" on this occasion, imho).
But I did tell Lucy that I had a pretty passionate session last year with someone who has since move on. So, I was also trying to guess who will provided some good fun under the shower. I found Crystal's warm personality attractive in that regard and thus came away with the gut intuition that I would like to joke around with her under a pulsating warm shower next time.
So that's my purely subjective 2 cents worth.