Patagosaurus was at least 4 meters larger.

Why do you always only focus on length? Would you say a rat with a 40 foot tail would beat a Suchomimus?

Your rat argument is ridiculous and doesn't prove anything.

Well did you look at the images?

Yes I did. When were they made?

Patagosaurus: 2018

Opisthocoelicaudia: 2019

Your Opisthocoelicaudia is from 2014, and your Patagosaurus is from 2013.

The rat with a 40-foot tail would have nothing on Suchomimus in terms of height. However, these two animals have extremely similar body shapes so the longer creature can be safely assumed to have a larger height as well.

Not all animals are square. Patagosaurus was a very primitive sauropod, so it's most likely that it didn't have such a long neck, or a high hip height.

Patagosaurus was still 4 meters longer, which I think is a pretty big difference.

That's just the tail.