Ahhh the clock speed wars. Back in the early 2000's, a higher clock speed meant performance. But that's not the case anymore with multi-core cpus. Nowadays, many AMD processors are stomped by an Intel processor of equivalent core count and clock speed. Ender is right, AMD is really only still relevant due to the lower cost of their processors and GPUs.
~ @benster82
At the same time, they still offer the performance while having more cores.
The biggest factors that people debate about with Intel vs. AMD, is that Intel have faster clocks per core, with fewer cores, and a lower general clock speed, meaning they run cooler. AMD have slower clocks per core, with more cores, and a faster general clock speed, meaning they run hotter.
I have a full AMD build, and I've seen my mid-tower run better than an Intel build, while on ultra on games like Battlefield 4.
But anyways, which brand you chose is really just on opinion and experience. Personally, I think Intel is for the mobile world, as it runs cooler and faster, great for laptops. AMD however, runs hotter and needs some higher up cooling than the stock cooler. Not that I wouldn't mind the stock, they're usually garbage on both sides. And I've seen AMD in a laptop, and an Intel. I'd choose the Intel any day. But for desktops? AMD.