Random thought - while the look of an image is influenced by many things - even film grain, my main concern is the lens perspective. So if I am able to crop at will, and I have a 35 mm lens and I'm trying to duplicate the perspective of a 50 mm lens just by cropping, it wouldn't be the same, unless .... (unknown)
Yes. A couple of years ago I was on a country road in Ontario with a brooding sky and nice red barn. I had my friend Gary make a couple of passes on his Honda. I took one photo wide (24mm EQ)and the other longer (~65mm EQ):
Two passes, two focal lengths by John Flores, on Flickr
When you zoom in on the wide shot it looks a lot like the longer shot:
Zoom in on the wide shot and it starts to look like the other. by John Flores, on Flickr
The shots differ a little because I was crouching more for one than the other. But otherwise the relationship between bike , barn, trees, and road are identical because I didn't move; my relationship to them is unchanged.