Unfortunately I've never seen any of the newer Asian talent at Muse so I can't offer a direct comparison to the SRM girls. (Although I'm sure my wallet is very happy.)
In general Keyonna at SRM is hard to beat. She's pretty, affectionate and always fun.
Lee is more of a "cool chick" you'd play pool with down at the Rivoli. She's got a wicked sense of humor, so be warned. LOL. Guys who click with Lee will love her.
I know Hannah has alot of fans on massageplanet.net. I think she's got a very pretty face and was friendly enough, but I didn't have much chemistry with her. Hence no repeat.
I've got really mixed feelings about Kate. I had an OK first session, then a really hot second session, followed by an average third. When I'm dropping $150-$200 I rely on some type of consistency. Keyonna and Lee have that, plus any number of girls at S9.
The Muse mixers certainly look interesting and that may be the way to get a quick tour of Asia. Then you can repeat with the girl you like most. Hopefully you don't like all the same equally or that could get very expensive! LOL