dual12

Again, my advice is to really think it through. The new camera isn't going to improve your photography much, if at all. You will get a larger image with more pixels, but visually a move from 16mp ...

What do you mean with "what do you mean?" People were making prints long before they had access to 24 and 36mp cameras. So, like I said, it's not necessary to have 24mp or 36mp to print.

The exposures are different in all the comparisons I saw. The Sigma is always less exposed.

No, and I would advise you to really think about whether you need a 24mp or 36mp camera. Based on what you wrote, it seems like you want one much more than you need one, since a 24 or 36mp camera ...