iPod Linux is faster on a Mini, that’s weird. These newer minis have a PP5022 at their core rather than the PP5020 seen in other new iPods. This allows for much better power consumption and slightly faster processing. At 75Mhz they’ve been kicking out BogoMIPS of around 37, compared to 32 for the PP5020 and 16 for the PP5002. Thanks Michael! Link.
Linux on iPod » Mini 2G Support