If you think the P133 is me, you're wrong. My P133 does United Devices, not F@H. It is my observation that UD gives much more credit for low-end machines than F@H. The UD algorithum gives credit (even if it does not use it) to ram, network card and HD space and discounts CPU capability.
My P133 has a UD capability score of 47 (a unit commonly takes 106 hours) and generates 6 points/CPU hour
My PII-266 has a UD capability score of 77 ( a unit commonly takes 31 hours) and generates 9.5 points/CPU hour
My PIII-500 has a UD capability score of 101 ( a unit commonly takes 21 hours) and generates 16 points/CPU hour
My Athlon 1900 has a UD capability score of 175 (a unit commonly takes 6 hours) and generates 31 points/CPU hour
Scaling everything to P133=1
P133 = Productivity=1, score=1
PII266 = Productivity=3.4, Score=1.6
PIII5000 = Productivity=5.0, Score = 2.7
Athlon1900 = Productivity=17.7, Score = 5.2
One can see that the UD score per CPU hour given does not even come close to the actual productivity of the individual machines. Thus, if you have low-end machines and one is trying to optimise scoring between the two systems, use the Athlons in F@H and give everything else (especially low-end machines) to UD.