In my opinion, almost all G4 do it very well in everyday task. When I make a speed comparison between some of my "high end" G4 machines I like to do it centered in video playback and encoding, because even this can be considered a common task, it compromise all the machine architecture, from hard disk to CPU, passing to all buses, memory an caches and also because even today (2012) cpus fall in some way in this task.

I have tested my 7448@2Ghz in a sawtoth at 120Mhz and 133Mhz bus, but even it was a little fast in a lot of task than my MDD 7455@1.5Ghz it falls in video encoding and other hard task (whithout talking of the superiority of my winter time only dual 7455@1.66Mhz

Now I understand why a 7448 never whas done. Because never whas really needed: in a 166Mhz DDR bus the 512k of L2 in the 7447 are mainly enougth. Further more, any body, any where has saw a 7448 as dual CPU in os 9? but 7447 may work as dual, if the card has 2 CPU of course

Sorry for my bad English.