If Porsha is formerly known as Miyuko, then you will get a very very attractive young woman, she is fun, very provocative ... however, she is a clock watcher and is restrictive. You will read from a previous review of mine - on the Durham site, that I had a slight problem with her the first time I saw her, but we are told that that was due to inexperience in the business.
Asia : hard to say what her age is, she's probably early 20s. Her looks are totally different from Miyuko (Porsha). Asia is a tall girl, not heavy in the least, but not a petite Asian woman. She is hit and miss dude ... when she's good, she's really good, but the most difficult thing is to get a hold of her ... she has adds running but seems to be selective about answering either the phone or e-mails.
If I was to repeat, it's a hard call ... but maybe Asia if you want a more down to earth relax feeling, Porsha if you want a fast ride.