What is the difference between an "Intel" and "AMD" processor?

What is the difference between an "Intel" and "AMD" processor?

Ali Nasri (Computer Specialist, Mac 911 Inc.) gives expert video advice on: How important is the type of processor in my machine?; What is the difference between an "Intel" and "AMD" processor? and more...

Intel is the largest chip maker in the world. AMD also makes chips. They're not as famous as Intel, but there's not really much of a difference. Intel is just the big marketer out there, and everybody sees the commercials "Intel Inside." All the Macs now actually run on Intel chips too, so they have a larger share of the market than AMD does, but they're both good chips.