It's certainly true that the Euro show style is heavy and that that scene favors stocky, sturdy, thick Dobes; and sure, they might tend to show them a bit overweight. I can say that about the American show scene too – that they are often overweight, or not in what I'd call working shape. Most show dogs of medium or large size are soft and, let's say, luxurious in body condition.It is known Euro showline are shown overweight, so sadly not a good comparison. Yes he will look heavier in certain areas but the standard between American and Euro is not actually all that different. NA males finish way before maturity so they look, well...not mature and not filled in.
He could look really sharp and crisp at 90-95lb by replacing what weight there is with muscle. Props again to you for putting in the effort and taking control of his health. I agree it's worrisome seeing those show males with that heavy of a body on the legs of a Doberman.
The Euro show style, like we see in the above pics of Tahi Reme Max, seems to favor everything that says "power." They are shown leaning into the lead and panting (which makes the snout look more substantial).
I don't see that much relevance in noting that the Euro and NA standards are not very different. We need to look at the dogs themselves.
Some Dobes are just not built to have a tuck-up. This goes to what I was trying to say with my body type talk above.
Cato, @Josht87 's guy, has lots of muscle. I don't agree that he needs to replace fat with muscle. He's already got the muscle.
I don't think Cato should go down to 95 lbs., and certainly not 90 lbs.