Questions for the boys - east or west, who's the best?

[qwerty2shoes]

I know the answers to my questions below, but I want to hear from you guys (yes guys only please)

For those who's had caucasian and asian lovers - girls specifically:

a) Who do you prefer?
b) Why?
c) How do they differ?
d) Who is better at what?

I know I may be generalizing here, please humour me