The Xbox 360 Arcade can play the Original Xbox games. Where the newer Xbox 360 can not. On the Arcade you can also download other old games. But sometimes you can do that on the other system.
yes the big difference between arcade and elite is memory
Yes, you can play regular xbox 360 games on an arcade unit. The difference in between the arcade unit and the pro system is the pro system comes with a hard drive to save game data/videos/etc.
The Xbox 360 arcade does no include a hard drive. The Xbox 360 pro does.
About two differences: one: the xbox three sixty has a harddrive two: the xbox arcade comes with free arcade games but doesnt have a hard drive
an xbox 360 arcade only has a memory card free but the xbox pro has a 60gb HDD.
The xbox 360 arcade is basically all white and the difference between the arcade and the pro is that the pro has a silver disk drive. The Elite is all black.
Microsoft says the difference between the standard (not elite) and arcade is: There is a difference in hard drive size Xbox 360 Arcade cannot play ALL original xbox games. Arcade comes with arcade games such as Uno Arcade is cheaper By pro i believe you mean "elite console". The elite console is black, not white and has a MASSIVE hard drive. But the elite is very expensive. I would go for the standard.
with the arcade you get a 256 mb memory card on the pro you get a 60GB HDD, Ethernet cable,headset
The arcade comes with a few arcade games, no hard drive but a memory card instead. you don't get high definition cables with arcade. with the pro gives you everything needed to start an xbox 360 ADVENTURE
Yes it can you.
yes you can put an xbox 360 harddrive into an arcade 360
The Xbox Arcade is an Xbox 360 and it comes without a hard drive. What you are calling an Xbox 360 I'm assuming comes with a hard drive and if you are thinking of buying an Xbox I recommend not buying the arcade as you cannot save games without a hard drive.