Re: AMD vs Intel WTH
"Efficiency", "Performance", and "Components" all fit under "Architecture" so mentioning them is redundant. Reputation and target group have nothing to do with why their prices are different. Why? Because one they both have good reputation and two they both target the same people since they both create processors with multiple number of cores.
Gamputer, the best advice I can give you is to research the architecture of every processor tree (Core 2 Duo, Phenom, Core 2 Quad, i7, i5, Phenom II, Athlon). They all should vary, although some less than others.