We don't have enough materials for argentinosaurus to know how it's body shape was like, isn't it ? So far it doesn't seem like there is enough proof that this animal having brachiosaur-like body. So i prefer to stick with this old reconstruction. Are you comparing this animal to Alamosaurus and Patagotitan ? Then again i saw few different reconstructions for Alamosaurus and Patagotitan having brachiosaur-like body and then the Salatasaurus-like body. Have you seen the reconstruction of Dreadnoughtus ? Sometimes people create different reconstructions for a same animal as they have doubts. I did wanted to ask a question to a paleontologist about Alamosaurus having brachiosaur-like reconstrution.