I got two 1983 d cents to compare the two. The first ones is the wrong one. His neck is a lot longer than the other it's a lot shorter.
Cool observation. I think it is a case of optical illusion due to the different texture and color of each coin. Top coin does not have a defined line at top of lapel collar, has a rougher surface and reflects light differently. I can see what you are saying. they do look different. Take a mesurement from bowtie to bottom of chin.