Definitely different. Yong and Kelly both tend to be very talkative. I'd sum it up this way:
Yong = sensual and seductive. charmer with great skills - makes you feel like her bf
Kelly = copious talker, all smiles, and the tightest pussy around - makes you feel like a beast
Sugar = pretty and sexy at the same time, friendly and accommodating - makes you feel warm and fuzzy inside
Pinky = ultra cute, much quieter, maybe the tightest body of the bunch - makes you feel like you're taking advantage of someone you shouldn't
Overall, you can't lose with any of these babes. Never once had a bad experience ever with them. They are definitely all cream of the crop. Once you sample them all, it's just a matter of personal taste.
Hope this helps.
Hank