4th March 2003, 7:53 PM
Not at all. The 64DD was an add-on that could only play games specifically made for it, and it used a proprietary Nintendo medium. The SD card adapter is just something that would let you use an established memory card format. You don't play games on it. It would pretty much be a bigger memory card or some sort of storage system, and you'd be able to use digital cameras and the like with your Gamecube. I don't see the parallels at all.