While Iguanadons are much better in almost any way, Parasaurs still have their uses, and are definitely great for early berries. The reason being a parasaur is much easier to get saddle up and ready go, being 20 some levels before Iquanadons’s saddle. They also don’t attack you while caught in a bola making them easy to tame fast with a club. This is all not to mention the turret mode which can be very helpful throughout all game.