Looks like they were taken with two different lenses. Field of view is different, angle of elevation is different. Astronaut is standing much closer to the flag in the color shot. It actually looks like B/W was taken first, then they probably walked to each other and traded cameras or positions or something, then one walked back to the flag. While the other moved to a new position to get the best photo with the second camera lens which might have involved moving 10-20 feet if it had a different focal length.

There are so many possible explanations for these differences, this is a horrible reason to suspect the landings were faked.

Go buy or borrow a DSLR camera with at least two different lenses and you’ll figure this out real quick.