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Canon uses CompactFlash Type 1-- wrong format, this is SmartMedia.😕
The previous discussion about speed was regarding CompactFlash, not SmartMedia.
I'm under the impression that the speed increases discussed are more the result of the controller rather than the flash memory itself. For SmartMedia the controller is on the device, while CompactFlash houses the controller on the card (hence the relative bulk), so memory is badged and sold with varying degrees of rated speed. As far as I know SmartMedia itslef does not have significant speed differences across the board.
Of course, I may be wrong.