Different LIVE Domain In SDK And REST API

[skitii]

hi

    When using check-sdk-java(1.0.4) to integrate PayPal API, found different LIVE domain in SDK and REST API.

Sdk LIVE domain is api.paypal.com, but REST API LIVE domain is api-m.paypal.com, in my real test, api-m.paypal.com is faster than api.paypal.com.

And in Australia, the domain api.paypal.com's real IP is 64.4.248.23, which is in Tokyo, this made my SDK create order request so slow.

So, I would like to know,

1. What is the difference between api.paypal.com and api-m.paypal.com?
2. Why Java SDK doesn’t use api-m.paypal.com?
3. Can I use api-m.paypal.com As a LIVE domain In Java SDK?
4. Using api.paypal.com, why did Australia’s request go to a Tokyo IP?

Please HELP !!!  Thank You.