Well. When it comes to graphics, it's simple... integrated chips are worse as they have worse technology and use system resources, seperate chips are manufactured with graphics in mind and use their own resources so give better graphics and free up more resources for processing etc.
Processors become a little bit more complicated.
You have to look at a couple of things to see what the actual performance of a CPU will be. Intel now produce processors specific to each platform, the difference being low power usage on laptops and higher performance on desktops. The best way to show the difference is a comparison.
For £600 you wil expect a E6550 desktop processor and a T5250 laptop processor. They compare as follows:
E6550 - 2.33GHz per core, 4MB cache, 1333MHz FSB
T5250 - 1.5GHz per core, 2MB cache, 667MHz FSB
I mean... look at the difference!

Even if you don't know what they mean I am sure you can see which one is better? The Hz refer to the number of processes carried out per second, the cache refers to the 'memory' capacity of the chip and the FSB is the speed atwhich it can communicate with other components.
crabby