Hardly. There is a lot of 'blurring' of lines between RISC and CISC architecture. For example, the AMD architecture if VERY RISC like, while the PPC, IIRC, relies on some CISC tricks.
Not as clear cut as it used to be and state of the art has advanced a VERY long way as witnessed by the efficiency of the AMD chips and the raw clock speed of the Intel chips.
But as far as quality parts, I doubt what you pay for is 'quality' parts - at least, processor-wise. More likely you pay a premium for that little 'Apple' logo and all of the wizbang marketing that goes behind it.
One of the articles I linked to even indicated that Apple overcharges outrageously for memory.
[edit] In my 15 years of working with Intel boxes, I have never had a processor fail. Motherboards, drive controllers, and hard-drives, but no processors. The Apple motherboard might be better - some of the stuff that is coming out of asia is absolute garbage.