I hope some AMD users will chime in because I'm not familiar with them.
I am far from an expert with AMD but can offer a limited comparison.
Better than a year ago I bought a Toshiba Satellite 17 inch laptop. AMD rather than Intel because intel integrated graphics quite frankly falls into the category better known as Horse Feathers. The AMD version offered an ATI Raedon hybred video not a true video card but a step from the basic on board graphics.
A few weeks ago my other half's old Dell laptop appeared to be dying. Since I liked my Toshiba so much and Toshiba was willing to build one with Win 7 I bought one for her. they shipped it from China. Only took a week once shipped.
Hers is the same model 17 inch Toshiba Satellite except it has an Intel core I-3 with intel on board graphics.
The AMD graphics are far superior I see no difference in processing speed or load times etc.
There is another bonus the AMD uses a different on board audio program and codex. With the AMD audio I have the ability to use the record what you hear option. with an audio record program you can record whatever sound is playing on your system That ability comes from your audio system whether it be onboard or a sound card. It does not come from the independent recording program
The intel Toshiba Satillite version does not offer that what you hear option. The AMD version did both offer realtek on board audio
*A note about Record what you hear. Some sound cards offer that option some don't. Companies such as Sound Blaster do not tell you if that feature is included or not. I had to write requesting that information. they provided a list about 50% of sound Blaster models do the other 50% does not. Some on board audio does some does not. again they don't tell you. Realtek is the most common provider of on board audio for both Intel and AMD systems. Realtek is all over the board with including this option or not. I have three desktops and two laptops all came with Realtek on board audio Three have the capability two don't. Starting with Windows 7 MS disabled the feature but you can go into set up to enable it. I don't know what games they played with windows 8 For those who want that feature you will have to dig to find it. Likely contact the mother board people to learn what audio driver is included. the feature is built into the audio driver.
With these two identical laptops the AMD is equally as fast offering better video and better audio than the intel And it cost less
Of course all that is predicated on which processor you are buying. Both AMD and Intel offer a wide variety. When deciding make sure your choices are made by comparing equivalent processors. don't expect a low end AMD to give you results comparable to a high end Intel of vice versa.
I can only say two almost identical machines the AMD gets the better of the two. Obviously the mother boards are a bit different so there may be variables but pound for pound I'd pick the AMD in this case.