A direct comparison between Intel's
Pentium-II 333 and their Celeron-400 is available at our CPU
Comparator. In general, the performance of the mobile Celeron will
outpace the mobile Pentium-II at these speeds.
As shown on our Celeron statistics page,
the architecture of the mobile & desktop Celerons are pretty much the
same, albeit the mobiles have slightly lower power requirements. The
newest mobile Pentium-II's, as you have
noted, replaced their backside 512kb L2 cache (from the original desktop
version) with an on-chip 256kb L2 cache. To reduce power requirements,
however, the mobile bus speed remains at 66MHz rather than 100MHz as on
Clock speed for clock speed then, the mobile Pentium-II will speed past
corresponding Celerons, for its on-die L2 cache is twice the size. But as
explained in our L2 question, the effectiveness of an L2 cache
increases with CPU clock speed. Therefore, the 400MHz Celeron should
outperform the 333MHz P2, even with its smaller cache size.