The main advantage of the Intous is a higher accuracy. It has 2x-4x (depending on the Bamboo model) the pressure level sensitivity and also has double the movement resolution.
It comes with a small array of different pen nibs stored in the pen stand. There are 5 standard replacement ones, a flex nib, a stroke nib, and three felt nibs.
It also has those fancy programmable buttons and the programmable touch ring. Not really needed, but I like those because I got used to them. Some Bamboo models have express keys as well, though.
All those things combined might be worth the high cost for some, while for others it's just unnecessary bells and whistles. It really depends on what's important to you, personally.
You can certainly draw on both.