Interesting. My screen looks more like your last pic (3rd one)but still more like the iracing one than the 2nd image too.
Hard to tell for sure, but the car looks further back on the track in image #2 than image #1. The other thing that is not helping is that the horizontal offsets on #1 vs #2 aren't matched. This results in a cockpit view further back from the wheel. I don't even see the virtual wheel in the iracing shot but the "seat" in the 2nd image is far back which lets you see the mirrors, the tires appear smaller etc. The actual FOV might not be that different but hard to tell based on the cars not appearing to be exactly in the same position on the track or the virtual seat in the same position from the wheel. The landmarks do look similar in size though to my eye.
I'll get you the horizontal width when I get home later today as I'm curious as to how the FOV presents in iracing for my setup.