What we need is the variety at least. In 18/19 we had 4 wingers who all offered different things and it gave us a lot of freedom to play in whatever way we needed to.Aguero played like 15? minutes and instantly we could see his excellent movement leading to chances...If we have that consistently we can catch liverpool easily
If we have only Aguero we have a top class striker who is always looking for goals but they'll be games where we need more control or fluidity than he can provide. If we have only Jesus then we have more control and fluidity but sometimes you just need someone to make a few runs into the box and try and make something happen.
If we have both (or more perhaps with Torres/a new signing?) then we have the freedom of choice. One, the other, or both!