I think the subject is interesting, I am trying to get better at landscape photography, I am however unsure what methods yield the best results-
I been out the last days and chanced on couple of sunsets, both from rather boring places though. Tried to take some single exposures on my a7r and process them and they are both near the limit of what the a7r can do so needless to say it would just be garbage if taken with a Canon camera.
My question is, would they be better if taken as multiple exposures (with any camera) and mixed or HDR or any other form of processing? And if so what would the benefits be?
Well at least you have posted something the OP should have done, some landscape shots into the sun with the A7.
The first picture is really quite beautiful.
Were you being serious about saying the images would be garbage if shot on a Canon ? Not sure if you were being sacrastic or not.
In the first picture it looks as if the sun has virtually gone, obviously not in the frame so not a huge EV range in this pic. My only comments would be that the horizon is just a little off ( down on the left ) and the luminosity - light intensity of the sky does not match the luminosity in the rest of the picture, so to me it just looks a little unnatural, but that is just a personal point of view.
In the second picture the camera has been unable to record the sun disc which is no surprise. Perhaps you have a tiny bit more around the sun that's not blown than I would expect, but you'd have to put the two pictures together to notice it. You have a masking shadow or correction radius left on the hills, but to be honest I don't think you would see much of a difference between Canon and Exmor in these situations until you began pushing shadows more, which is not what most people want to do.
Regarding using B&B or HDR it is difficult to give a definitive response without seeing the raw files. I suspect the luminosity of the valley and hills in the second shot could be improved significantly if you'd worked from a B&B file.