Yeah, I don't know how other people rank and how they decide, but logically thinking, the disco music genre is one of those genres that are not known for huge variation, which is why many disco songs have a lot of things in common with each other. It's not insane to assume that if you liked Italy, you should have felt somewhat keen on Argentina as well. For me, personally, Argentina even had a bit more to offer in that regard.
It would've been okay if Argentina scored like less than Italy, but not by a 110 point margin. I can only assume that if this song was sent let's say by the French jury and it was in French, we'd have at least 80-100 points :/ Although we have a long history of songs in Spanish doing well too, so yeah, it's impossible to explain what goes on in the voting processes of all of the juries