When Pogba left, he was in a very similar situation to Gomes. If the comparison is when each footballer left then they had a similar track record. Both are prodigous technical talents with Pogba probably having a little more extra due to Pogba's shooting ability.
If you compare ages, then there is a difference because Pogba left after his age 18/19 season. So when he was 19 years old, he shined for Juve cementing himself as arguably the best young talent in football. Gomes just had his age 19 season and didn't get playing time. Therefore in terms of age, Pogba clearly was far ahead of Gomes in their age 19 season.
But if the comparison was indeed as you said "when he left", then they were very similar. I would say the only difference is that Pogba had the physical superiority where as Gomes has less clubs to choose from due to his physique.
This doesn't mean Gomes will replicate Pogba. I wish he does. His vision is excellent, as is his first touch, and ability to carry the ball. But it's hard to think a player is a dead cert after being burned so many times. Heck, I even thought Pogba was making a mistake by choosing Juve as Juve had Pirlo, Vidal, and Marchisio already.