Simple question. Can a full frame mirrorless deliver the same IQ, ISO-noise, color and contrast as a full frame DSLR?
I know that mirrorless is weaker when it comes to AF and shooting sports, but other than that? Can it be as good as, lets say 5D2 / 5D3?
This is a kinda of in theory type question, so there is no absolute answer, because we do not know what technology may be in it.
In theory, it can be the same, there are all sorts of patents on autofocus for mirrorless cameras that purport to allow fast autofocus. The problem is that we have not seen them in action, so they may or may not be as good as claimed. And, there are always drawbacks that you get with a new technology.
The Nikon V1/J1 technology could be put in a FF body and sensor, for example and we would see many good features, but also some drawbacks that we might not like.