[Q] Difference between V10A & V10A? topic

Hello everyone,

I recently visited this link: lg-phone-firmware.com/index.php?id_mod=36
after a quick search on Google, I didn't find anything of much help...
and I'd like to know what is the difference between
1) "77 6GR/GREECE_OPEN_16G V10A LGD802 1.92 GiB"
2) "78 6GR/GREECE_OPEN_16G V10E LGD802 1.92 GiB"

Thank you! :)