What is the differences betwee these two Xbox 360 console Pro 60 gig bundle and Arcade version?

What is the difference betwee the two Xbox 360 Pro Bundle 60 gig and the Arcade version?
Which is better and last longer or are they the same.They both have the same price range.

Arcade comes with 5 free arcade games that you would normally pay. it does not come with a hard drive to store game demos or videos and music and photos. Your best bet is to get the refular for $ 350.