Late but good question(is there an answer?)
When intel released northwood way back when, they lowered the L2 cache on the celerons to 1/4 of the pentiums. The Williamette celerons also had 128k. There are also identical models, the 1.8 and the 2.0.
Other than the 130/180nm difference and power usage, would there be any performance difference when using a Williamette Celeron 2.0 versus a Northwood Celeron 2.0?
Celeron 2.0: SL68F, 2000mhz, 128kb, 400mhz, 71.2 Watts, 180nm
Celeron 2.0: SL6VY, 2000mhz, 128kb, 400mhz, 52.8 Watts, 130nm