The La Liga duo are widely regarded as the two best players in world football and Suarez has claimed that he would find it difficult to separate the pair.
"Messi and Ronaldo are totally different players." he told Helden Magazine.
"I can't say who's the better one of them. Messi has beautiful technique, scores a lot, is an excellent dribbler also because he's a little guy.
"Ronaldo, on the other hand, looks like a machine. It all looks so perfect with him. He combines power with intelligence and always strikes the ball perfect. They're both on the same level."
Suarez scored 31 times in the Premier League in 2013-14 campaign.