Win 7: Blue box vs green box?

[frldyz]

Im looking @ some sites for Win 7 64 bit professional.
I see some sell a green box, some sell a blue box?
Also some say SP1?

 

[PP Mguire]

Green box is Home Premium, blue box is Pro. SP1 just means SP1 is integrated into the build.

 

[Joe C]

SP1 = Service Pack One. Basically it means a group of Microsoft updates rolled into one package