I haven't seen Wei Wei since she was on Lombard, but I've seen Haida and you'll get more skin with Haida. Haida is quite pretty too.
WeiWei
Pros:
Great massage
Good ST
Young, pretty and up for most items with the right price (for a std handshake establishment)
Cons:
Talkative
Shorts on time sometimes
Finish is hurried few times
Bit pricey
Haida:
Cute m, pretty and Sweet (bit biased here ..)
Great ST and never rushed
More mileage and very accommodating within limits
Cons:
Weaker massage
Sometimes double books and the monger is usually the one that has to adjust and not the establishment
But my vote is usually for Haida, you know when you visit her..