Solid state media that you can connect to these things has been (for several years) loads faster the buses in these machines.
All you need is to find somebody with two pretty similar machines -- perhaps a 475/605 and a 630, and a 575/580. (To be honest, you probably only need one pair of those machine.) Run disk benchmarks on a CF card adapted directly to the 580's bus, and bench the same CF card connected to the 575 via an AztecMonster.
I suspect what you'll find is that in those particular machines, the performance is going to be similar.
Another question is how the AztecMonster and the cheaper SCSI2SD compare. For the purposes of a Mac, it probably really doesn't matter. At the time, CPU speed was at least as big a factor, and today, if you're applying modern usage habits to the old machines, RAM becomes a big factor, etc.
This all compares to today where storage is so important in part because Mac OS X doesn't know how to handle RAM and because it's the most significant bottleneck in computers these days, to the point where the actual interface to any spinning disk hasn't been the slow part for years, and few computers are picking up on PCIe based solid state disks.
But that's neither here nor there. I don't have the relevant machines on hand, but for somebody who does, and who has an afternoon for some benchmarking, I'll throw in that I'm also exceedingly interested in seeing the results.
All you need is to find somebody with two pretty similar machines -- perhaps a 475/605 and a 630, and a 575/580. (To be honest, you probably only need one pair of those machine.) Run disk benchmarks on a CF card adapted directly to the 580's bus, and bench the same CF card connected to the 575 via an AztecMonster.
I suspect what you'll find is that in those particular machines, the performance is going to be similar.
Another question is how the AztecMonster and the cheaper SCSI2SD compare. For the purposes of a Mac, it probably really doesn't matter. At the time, CPU speed was at least as big a factor, and today, if you're applying modern usage habits to the old machines, RAM becomes a big factor, etc.
This all compares to today where storage is so important in part because Mac OS X doesn't know how to handle RAM and because it's the most significant bottleneck in computers these days, to the point where the actual interface to any spinning disk hasn't been the slow part for years, and few computers are picking up on PCIe based solid state disks.
But that's neither here nor there. I don't have the relevant machines on hand, but for somebody who does, and who has an afternoon for some benchmarking, I'll throw in that I'm also exceedingly interested in seeing the results.