What is the difference of Minecraft Normal editon and Premumin editon?

Normal is a virgins
Preimumin is for people who will never lose their virginity

There's only one edition of Minecraft…

False

There's no normal version, you either have premium or you have the demo version.

The demo version is creative only and you can't play online or use mods. The premium version allows you to play in any game mode, use mods and also play online.

It used to be that Minecraft had what was known as "Premium Accounts". This was a user who bought Minecraft, and therefore could play the whole game.

People who had an account, but hadn't paid for Minecraft itself, had normal accounts. They could log in, but only play Minecraft in demo mode.

Both of these stopped existing when Mojang transitioned everyone to "Mojang Account" instead. This was done back in 2012.

There are five editions of Minecraft, each on its own platform. PC, XBOX360, PS3, iOS Pocket Edition, Droid Pocket Edition. There's only one version of Minecraft on each platform -- IE all PC editions of Minecraft are the same (once fully patched).