It’s a fairly reasonable comparison.

Just trying to throw away the concept of size is probably the most unfair thing here. You are trying to change the conversation so your argument appears valuable. Then you kind of piss that attempt at goal post moving by claiming that while size is irrelevant, somehow shape is. What a strange move.

You make a good point on the US state vs Country comparison, I think that certainly plays a much larger part than size or even population. But if you wanted to argue that point, rather than dismiss relevant concepts or inserting ridiculous ones - you could rebut with a question like “can you name the subjects of the Russian Federation?” Or, if you are in a fighting mood (which…clearly), you could just respond that American exceptionalism has them overvaluing the relevance of US States on the global scale.