I think that's the point, though---the "great" coats to which I was referring aren't trendy. If anything, all previous advice has suggested staying way from trends, really. These are classic coats that are professional, which is why so many people wear them, and why they were suggested. I don't think the other coats people mentioned are bad coats, or don't do the job. But a long camel coat, a kakhi trench coat---I'm not a fashionista, but there's a reason why people refer to them as wardrobe staples. If anything, just let the people who were going to wear a sweatshirt to their interview read this advice and take it into account
I simply believe the suggested coats are consistent with a professional outfit... a long, wool jacket is commensurate with a suit. More say, than a puffer coat. And many of the other coats mentioned (probably yours!) are great as well. It's perhaps not worth comparing one pea coat to another, since they are so similar. These are just tips to create a professional, put-together look.