Hands down Rivaldo. Subjective as hell, but Rivaldo it is.
I believe one of the factors affecting Rivaldo's perception in the football world is his temperament.
Aside from his arsenal of talents, Ronaldinho is a very appealing figure, ever-ready with a smile and - as far as I'm aware - in sound relations with practically all. IMO this influences the way we view him outside of his skill. Rivaldo was a more turbulent presence.
So ... I figured many would be in Ronaldinho's corner, especially since Rivaldo is the past and Ronaldinho the near future. But, my faith in the judgement of soca warriors is maintained because most see that Rivaldo is where the buck stops and should stop.
The truth is on every level: goals scored, the character of the goals, the impact on team, surrounding cast (Jah Gol's point) and even the strike rate of goals (I believe) bring the curtain down on Ronaldinho.
With Rivaldo there just seems to be much of the 'turn nothing into something' element, whereas with Ronaldinho you're expecting magic right through.
My other complaint about Ronaldinho (and I admit to be injecting some WC stuff beyond the scope of the thread) is that I haven'treally seen him solve problems on the field with the sort of doggedness and tenacity I saw with Rivaldo.
One man's opinion.