CPU operations are now so advanced that any claims of superiority of speed etc are of academic interest only.
If you are going to spend all your computer time checking how fast this, that or the other is going, buy the most expensive, fastest CPU you can get your hands on but, remember, next week that same CPU will be old hat and being sold off in the bargain bin. If you are going to use your computer for what it is intended for i.e. doing something useful and not contemplating its own navel, buy one that which represents the best value for money at a price you can afford.
As CPUs do the same thing in the end, it doesn't really matter, from a practical point of view, whether it's Intel or AMD. Buy the fastest one of either brand which is within your budget but remember that in a short time it may well be less than half that price when it's superseded by something else 0.2GHz faster.
I remember a couple of years ago when the 1GHz "barrier" was broken. This made headlines in the national press and the units were sold at an unbelievably high price. Nowadays you are lucky if you can even find a CPU as slow as that for sale.