Having seen both of them, it would be a no brainer to say Lucy... if she was offering the full service she used to. It boils down to:
- If you want a massage, then Lucy - she's had training and is not shy to dig into the muscles, if you like exploring your pain/pleasure boundary. You're unlikely to get her to cross the line in what she's offering unless you want to make her a serious offer. And even then.
- If you want a good fuck, then Lilith - as GBET says, she's up for most things
- If you want both, then look elsewhere.
Lucy is more attractive IMO, older, more of a dom and nicer tits (if that's important to you). Lilith is more sub. Neither are slim gym bunnies.