Whole cows milk or toddler 2 step formula?

My son will be 1 year old in a few days and we have been trying to wean him away from formula/bottle and offering lots of foods and watered down juices. In the last month or so he had suffered an ear infection and had a hard time swallowing foods, so we kind of got off track and he was basically only drinking formula for a few weeks until he felt better. My question is, since we got set back, I’ve been thinking about using a toddler formula after he turns 1 year to get him back on track. He is also very tall and thin. Although he is considered a healthy weight (50th percentile), his height (97th percentile) make him look skinny. He also *never* seems to get full from infant formula and baby/soft foods. Would toddler formula help him feel full and maybe gain a little weight? Would it be better then whole cows milk? Thanks in advance!