One big difference (which the article seems to mostly ignore) is that the shortest project was written by a single developer, while all others were a team effort.
Having the whole project - design, architecture, all implementation details - in one head is not a trivial advantage. Even ignoring communication overhead, there might be subtle duplication of code simply because different people choose to do similar things in slightly different ways.
While the ratio of Rust to Python code kind of matches my expectations, I wonder how much of it might be due to the difference in team structure vs the difference in chosen language.
Having the whole project - design, architecture, all implementation details - in one head is not a trivial advantage. Even ignoring communication overhead, there might be subtle duplication of code simply because different people choose to do similar things in slightly different ways.
While the ratio of Rust to Python code kind of matches my expectations, I wonder how much of it might be due to the difference in team structure vs the difference in chosen language.