Should there be any difference in read/write speeds of the same speed and UDMA type cards (I am specifically asking about CF cards) that are of different sizes. I don't have any cards of the same brand and speed and of different sizes to test this.
In other words does CF card memory work like RAM, with the larger amount of memory being faster.
So as an example, would a 16 gig, Lexar, 400x, UDMA, CF card read/write faster than a 4 gig, Lexar, 400x UDMA, CF card; considering that I would be shooting with the same camera and downloading with the same setup!
I do know that UDMA cards will write faster and will transfer data faster (when using a UDMA capable reader) than non-UDMA cards - if the camera can take advantage of UDMA capability.
The UDMA cards also download considerably faster if I use a UDMA capable card reader than when I use a non-UDMA reader.
Even when shooting a camera (such as my backup 40D) which doesn't take advantage of UDMA capability, downloading the cards to a computer with a UDMA capable reader is considerably faster than downloading with a non-UDMA capable reader.