Lemme just put it this way.
Athlon MP 1.0GHZ (If it were made today, it would have been called Athlon MP 1130+ I think)
Athlon MP 1.2GHZ (If it were made today it would have been called Athlon MP 1366+ I think)
Athlon MP 1.33GHZ (AthlonMP 1500+)
Athlon MP 1.4GHZ (AthlonMP 1600+)
Athlon MP 1.46GHZ (AthlonMP 1700+)
Athlon MP 1.53 GHZ (AthlonMP 1800+)
Athlon MP 1.6GHZ (AthlonMP 1900+)
Athlon MP 1.66GHZ (AthlonMP 2000+)
They're all the same chip, running at different speed.
AMD worked it out like this. The 1.0GHZ Chip and the 1.2GHZ chip were made before the Quantispeed architecture "Monicker" existed, but they're really the same chip running at different speeds.
They will perform better than Athlon's at the same speed (12% or so..)
They would be a steal! Espically so cheap!