I decided to compare ships from different versions of the game. Let's start with Hog Islander...
As you can see, the overall dimensions are approximately the same. But if you look at the details (masts, anchor, inter-deck spaces etc.), then the discrepancy in proportions and sizes is very striking.
The SH4 ship even has a strange hull shape (the delirium of a drunken programmer).
Rating: There's nothing to rate here - it's trash. Throw it away and forget it.
The SH5 ship is more similar, but has the same problem with sizes and proportions.
Rating: 2.5 stars.
There's not much to say about the last ship. This is almost the standard of what a game ship should look like.
Rating: 9 stars.