It's interesting to note that those "Road Apple" Awards are very selectively awarded. Some machines avoided that tag simply because they were cool, like the original, stock CC, IIRC.
Many with that nick' don't deserve it, simply being the "LowEndMac" of a generation can hardly be cause for "Road Apple" status. Apple hobbled many a HighEndMac that has escaped "Road Apple" status.
I never notice any difference between my lamed IDE HDD interfaced Quadra 630 and a SCSI Drive Equipped Mac. Then again, I almost never left a, miniscule, stock Apple Drive in ANY Mac I've ever owned. Those always went into an older machines as internals or externals, because they invariably required larger drives.
I put big, fast Seagates into the SCSI Macs and BIGGER FASTER Western Digitals into the Q630 and the P6360 and then the G4 DA.
I'd almost bet that Apple's kluged IDE interface on the so called "Road Apples" would be faster than their kluged SCSI interface if you put comparably, BIGGER and FASTER HDDs on a "Road Apple" and comparable SCSI based Mac.
Yes, SCSI DRIVES have and probably always will be faster than any IDE implementation, because they're invariably intended for a more High End System. But given Apple's incredibly bad/SLOW classic SCSI interface and equally bad, but a bit less SLOW original IDE interface.
Road Apple HDDs were the problem, not IDE, IMHO! }
Remember, the COPRO-less LowEnd Q630 outperformed the IIfx in floating point operations! :approve: