Just better than Rex trust me, on a quadrupedal stance they can run faster and more manageable for travel and on the bipedal stance they are great for offense while slower on land and water they can make up for raw damage, first off the Rex only has a slow space for attacks and has to move a lot for fast targets which is same for Spinos but when they go bipedal they have extremely fast reflexes for attacks and a fast pace for more space and range so I recommend for anyone