The Manchester City forward starred as the club went on to win the Premier League on the final day of the season, while Messi's Barcelona lost out on La Liga in the final game after failing to beat Atletico Madrid.
When asked in an interview with himself if he thinks he can ever reach the four-time Ballon d'Or winner's level - whom he once said he aspired to be like - Aguero admitted his desire to be the greatest forward in football but jested that it's Messi who wants to be like him.
"Let's hope I can one day be the best player in the world," he said, in an interview to mark the launch of PUMA Tricks.
"But hang on a minute - I don't dream about being like Messi... because he dreams of being like me!"
Nigeria, Iran and Bosnia are the competition for Argentina in the group stage and Aguero believes strongly that Alejandro Sabella's side can go all of the way.
"World Cups are always difficult, but of course I hope that Argentina will win. Of course I am confident that Argentina can win," he said. "Spain, Brazil and Germany are also pretty strong. They're all good teams, but games are there to be won.
"I don't believe Argentina have an easy group. At the World Cup there are no easy games."
Aguero also stressed that his belief in his abilities will not waver if he does not begin the tournament in goalscoring fashion as he experienced a barren spell in Argentina's 2008 Olympic campaign before the nation went on to win the gold medal.
"If I fail to score in the group stage, I can keep believing I will score in the knockout stage, because that's already happened to me.
"It happened in Beijing at the Olympic games. I was in the starting XI throughout the group stage and I didn't score. Then in the quarterfinals I didn't score either, but the coach believed in me and in the semifinals I scored twice. And, on top of that, against Brazil!
"So I know I will believe in myself because I have already experienced the exact situation. You have to stay calm and believe the goals will come. You might score loads of goals in the group stage and then none in the latter stages. Football is a strange game."
Aguero is among a number of global superstars who will be sporting the new PUMA Tricks boots in Brazil this summer.
For more information on the PUMA Tricks boot and Nature of Believing, visit PUMA FC.