I have CF and SD in Mechy SCSI card readers on both my A500 and A2000. Haven't run any speed tests in a while but from what I recall the CF was faster than the SD. This is about the most direct "apples to apples" comparison one would be able to do. Although there's so many variables involved in this question - the make and performance characteristics of the card, they type of interface used, I imagine the file system would affect performance, how many adapters are required between the devices... Good luck! :lol:
This thread reminds me that I've still got a 2091 sitting on my shelf, halfway done with the 14MHz hack. Maybe one of these years I'll get around to finishing it! :rofl: