Can you see a difference between sharpness of the two images?
Pay particular attention to the clarity of the tiny bolts brackets on the grey poles. Remember that these are two different examples of the same lens, using the same photographic technique to take each image.
This is quite a large enlargement. The full size image is shown on the right with the area in the test section ringed in red. The rather unusual subject is the roof of an aquarium in Hull. Although not a railway-related there are plenty of edges which are a good indication of sharpness, as well as some fine detail in the brackets.
The author’s opinion is that the second lens is sharper although the difference is harder to see on an image prepared for web viewing than when viewing an enlarged image on the computer at home.
The first lens would appear to be faulty. Of course the final test is shooting a train not a roof !