AMD Athlon, 9 Floating points operations per cycle
Pentium 4, 6 Floating point operations per cycle
Now the math!
AMD 2.2 GHz
Pentium 4 3.2GHz

AMD = 19.8
P4 = 19.2

In speed i CAN tell you that AMD is fater than P4 when even the p4 is 1 GHz ahead.......
HOWEVER
reliability bla bla bla im not going to go into this stuff!