He was playing in the Dutch league, Even Huntelaar score tons of goals there, He helped his team by Uruguay by blocking a goal with his hand

Aguero won the EL, he's proven in La Liga. Both are still do it on the big stage. so you couldn't say that Suarez is better right now, as Kyle said this year both are playing in top teams, you could see who's better.
As for talent Aguero is far more talented than Suarez.