I'm starting to think a little differently about Onana, as the Cameroonian goalkeeper hasn't been the best since Inter. Even though his statistics were quite good when he played at Inter Milan, I think the strength of Inter defense is a factor in Onana quality. We know that a club like Man City was only able to score one goal in the UCL final last season, and the number of goals conceded by Onana and Inter was very minimal. Since joining Man United, Onana has had difficulty adapting to a very different league playing culture, and is not supported by a good defensive line. This automatically makes Onana perform badly, and almost always makes mistakes by making blunders.
So it is clear that De Gea is indeed better than Onana, I think it is also very natural for everyone to compare the two. Because The Red Devils treatment of De Gea is considered unfair, as one of the players who has served United for a long time.
It's obvious at this point that onana's exceptional performance at inter was definitely as a result of the defense system at inter which at some point made up for his blunders that would have been obvious, if the UCL finals last season was the only yardstick for judgement as to how well onana could perform then I must say that judgement was very defective.
In order to be sure enough and pass a good judgement, they should have put into consideration his cumulative performance throughout the UCL last season and his performance at their local league aswell that way we could give proper verdict to as if he was good enough to be bought and made the first choice goal keeper for Manchester united.
De gea is a far more better goal keeper as compared to onana, he not only make exceptional saves he also cover up for some defensive errors, something onana cannot at this time do. I would say this comparison is definitely not matching at all as they are both far apart in quality and the difference is just too big on the other side of one as compared to the other, they may have both played in bigger leagues but they still don't match