If the Angelina is SexyAngelina (I think she was called when I saw her) then I've seen both once.
Angelina was very enthusiastic - great deep throat and LOUD in the sack. Good PSE stuff. Personally I found her a bit mechanical though. For example she loved fucking in front of the mirror but just stared at her own reflection the whole time. She also seemed unable to speak English enough to really hold a conversation. Or to understand the words 'look at me'...
Emma was extremely chatty and much more natural GFE. However she's a bit larger than her pics suggest (I think her newer pics are more accurate than when I saw her).
Angelina I left feeling like I'd been milked. Not in an entirely unpleasant way obviously.
Emma I left feeling life was great.