From the second post of this thread:
Originally Posted by Rogue Nine
Which is better: Intel or AMD?
Quite possibly the most oft-asked question not only in enthusiast circles, but by everyday users and novices alike. The short answer is: Intel, by virtue of its line of Core 2 Duo/Quad chips which consistently outperform their AMD counterparts in almost every benchmarking test undertaken.
Intel chips are fast, consume a conservative amount of power and run cool. This is not to say that AMD chips are not viable options as well; they are generally cheaper and many casual users and enthusiasts still use them, especially the Black Editions which are pretty much designed for overclocking. However, Intel has AMD beat in almost every way performance-wise.
Intel's newest chip, the 3.0Ghz E8400, runs on a 45nm manufacturing process, which means it can fit a larger quantity of small, efficient semiconductors onto a microprocessor chip. The end result is a CPU that runs cooler and more power-efficient than the previous generation of chips which uses a 65nm process. Right now, AMD currently has no 45nm chips on the market as they're still promoting their 65nm and 90nm CPUs.
So in summary, Intel is better in both categories you mention. Intel chips tend to have a higher stock speed than their AMD contemporaries and also tend to be more efficient as well, consuming as much, if not less power than their AMD contemporaries.