I made several test, comparing this two machines whith exactly the same system software (9.2.2-CPU 5. 8) :

- G4 MDD 7455@1.66Ghz, 166Mhz FSB,Radeon 9000 PRO 64Mb, 1.5 Gb RAM, and

- G4 Sawtoth 7448@2.040Ghz 120Mhz FSB, Radeon 8500 64Mb, 1.5 Gb RAM.

The MDD is 10-15% faster in video playing and encoding (using 3ivx),Photoshop, SoundJam MP3 encoding and Classilla page scroll.

The Sawtoth is 10-15% faster in Adobe InDesign, Acrobat Reader and VectorWorks rendering.

In the Sawtoth only one CPU is working, while in the MDD are working the two.

If disable one CPU on the MDD, Photoshop and SoundJam perform very similary in both systems.

I don't know what make the MDD perform so well, but in general it has a better Motherboard arquitecture in addition to 2Mb of L3: 166mhz FSB, AGP 4x, DDR 333 Mhz whith good DMA.

Upping the FSB on the Sawtoth to 133Mhz don't make big differences and make and loss stability.

The MDD at 1.66 loss stability also, if ambient temperature is over 21 ºC. (I had to continue to work in his overclock)

Sorry for my bad English