The Yosemite board was the one used in the Blue and White G3 Power Macs. It was rumored that full fledged G4 machines would use a logic board named Sawtooth. The rumors turned out to be partially true. The 400MHz G4 lacks a few of the features found on the 450MHz and 500MHz models which use the Sawtooth board. Below we provide you with a summary of the differences.
Longer bars are better.
Bear in mind that MacBench 5.0 was released well before the G4 processor and AltiVec. MacBench and does not currently test for gains achieved by AltiVec optimization although it is safe to assume future revisions will offer this ability. Internal Links G4 specifications and features compared to other Macs MacBench 5.0 Comparison Generator - Compare scores on the fly.