Thank you! That's where I was screwing up, I was reading the datasheets as 16 megabytes, I was like "...There is no way that is correct..."
Well, looks like I'll have a spare 32 MB card to put up in the trading forum once they arrive. Assuming they both work correctly.
Now I just have to figure out which one to keep. I think I'll go with the spectrum eng. one. That one seems more like the design I am familiar with.