G3, hands down.
The PB 1400's 133 MHz 603e only had a 128 KB L2 cache - the G3 has half that on-die as L1 cache. Even with only half the cache, that cache being full-speed on-die combined with the 3-times-faster CPU (and the architecture improvements the G3 has over the 603,) makes the G3 faster, no matter what.
The PB 1400's 133 MHz 603e only had a 128 KB L2 cache - the G3 has half that on-die as L1 cache. Even with only half the cache, that cache being full-speed on-die combined with the 3-times-faster CPU (and the architecture improvements the G3 has over the 603,) makes the G3 faster, no matter what.