Without getting into the AMD vs Intel debate, as you can search that on the forums, Intel has a far superior architecture than AMD. This results in a lower power consumption, higher single threaded performance, and strong multithreaded performance as well.
However, the reason why Intel is "better" than AMD is funding. AMD has a mere 10% of the funding Intel does. This is for everything, including their graphics department as well. Given that, AMD deserves a degree of respect for still standing in the market.