Phone LG G2 D802 or F302

Hello , I want to buy a G2 but i am not sure about which of the 2 editions fits me most . Anyways this is not the reason i am writing this post .
I d like to ask anyway who knows some things about those 2 .
1. How s the battery life on F320 ( i know how s on the D820 cause a friend has it )
2. Where s the best place to buy one?
3. Will 4G work in Greece ? ( we have 4G carrier ofc )
4. What are the differences generaly?
Thank you beforehand