Ronaldinho was no dribbler in the clasical sense, in tight spaces he tended to hog the ball for the opposite player to make a wrong move for his dexterity to work. Between the fabulous touches and flicks it was not all that exciting. Now that worked fine but not in all games and after he lost his fitness was really-really slow to get the ball running.
Messi was just a fucking machine, you dropped him in the middle of the clusterfuck, he found a way to pass the opposition in control or if not he will get mauled making your heart stop for a second seeing that young lad getting mauled by grown ups. You left him in the middle of the pitch, he was straight running towards the goal. I was not that young and I never saw someone like him. It was like a cartoon from the 60'

) So it was very fun to watch. But I think it depends on what you like, if you like flicks and feints, nice executions, Ronaldinho was way more spectacular. But I like total football and Messi was like the meme or the reincarnation of that concept.