Question

What about you和How about you有什么区别

Answer 1

第一种情况
当表示“那你呢？”的时候，What about you?和How about you? 两个意思是一样的。
A: I would like a cup of tea，what about you?/ how about you?

第二种情况
1)当表示提供一种选择时，用What about ……?
A: What do you want to eat?
B：What about Sichuan food?

2)当表示否定对方的提议，并提供另外一种选择时，用How about ……?
A: What do you want to eat? Sichuan food？
B：How about Shanghai food?

Answer 2

what about表示建议,征求意见：怎么样?
-I want an apple.What about you?我要一个苹果,你呢?
而how about you更多是强调感受
-I feel a little cold.How about you?我觉得有点冷,你觉得呢?

Answer 3

先举个例子：A：i like english ,chinese and math, what about you?
B：me too.

A：i take school bus go to school,how about you?
B：bike.
这2个疑问句在不同的语境下有不同的意思，要寓意。how about 则重在以什么样的方式。

Answer 4

在语法要求不很严格的场合可以通用.但是存在细微差别,
What about you?一般用于询问对方的身体状况和近况等；
How about you?一般用于提出自己观点后,询问对方意见.

Answer 5

问做什么事情，就用 what about you
问怎么样或怎样做，就用how about you
carlos19900105 的例子能说明区别:
例(1)
A:i like english ,chinese and math, what about you?
B:me too.
此例中A 问对方喜欢“什么语言”，即: I am asking "what language", and the question is "about" you --- what language you like. 所以:What about you?
例(2):
A:i take school bus go to school,how about you?
B:bike. 上
此例中A 问对方怎样去，即:I am asking "how to go to school", and the question is "about you" --- how you go to school. 所以: How about you?