Minecraft 1.7.3 contains bug fixes for 1.7, so, it is a different version, but with practically the same features.
No. You must have the same version
No.You have to play on the same PC.
A LAN world means if someone is playing Minecraft using the same modem/router as you, they can come into your world and play with you.
In roblox you can do a hell of a lot more e.g play sports and have gun fights but minecraft has better graphics and you can play singleplayer
Same as they are now. Except you push different buttons to take screenshots
Yes, as long as they all have java installed, they can all download minecraft as a .jar file no matter what OS.
Yes and no.Only if the device is the same family as the original account. If you have a computer Minecraft account and want to play Minecraft on an X-Box you won't be able to.X-box Minecraft accounts will not work on an iOS Minecraft account, etc.You still need to buy seperate iOS, Android, X-Box, Playstation and Computer games/accounts. (Mac, Windows and Linux can use the same account tho.)
AnswerMinecraft and Call of Duty are complety different. Why compare them when they aren't the same. They are both equal in different ways.
Same way you get minecraft on any computer download it.
No.
The different minecraft versions are incompatible.