[Rover]

My camera also has dual slots, and the one before that also had this arrangement. I've been using mostly SD ever since I got that previous camera (Canon 1D Mark II N) because they're that much easier in operation. I've switched to Micro SD (the full size SD found themselves in my wife's possession and god knows what she's been doing with them... I also gave all the CF cards away to colleagues) in the last few years since I got a smartphone because it's a very nice option to be able to transfer the photos to the phone (and further) by just swapping them in and out like I would when using laptop. So I think SD should be the default choice for most people???