I have heard this argument come up again several times recently. Lots of folks out there from the enterprise storage realm still love their FC drives. The SCSI crowd like their units. Both handily disparage SATA as being inferior, poorly performing, or with higher failure rates.
This is an interesting point.
As far as I am aware, all the drives come physically off the same manufacturing production line. The only significant difference between the units that I am aware of (modulo newer motors on newer units) are the electronics that connect to the bus.