How is that funny?
Henry was a more intelligent player, he was quicker, stronger, more technically gifted and alot more creative. I don't think you'll never see Ronaldo carry a team like Henry did with an inexperienced Arsenal side in the 2006 Champions League, and don't you dare try and say Ronaldo did in Real's most recent win, cause there were better performers and players who offered a greater importance in the critical moments.
Ronaldo's turned into a deadlier finisher, less of the finesse Henry had but a bigger danger from other areas, both aerially and outside the box. Better off the ball too. He'll statpad by getting into the right positions rather than producing a moment of brilliance that gets everyone out their seats. In fact he's probably developed into more a striker than Henry ever was, the number of times he takes up Benzema's position you'd think Benzema was the winger for Real Madrid.
When people mention Ronaldo's greatness it's always his goal record (a phenomenal one at that I might add). You compare that to say Messi and people compare him to Maradona for a reason. Not just his scoring exploits, but the all round package - dribbling, creativity, passing, moments of genius on the pitch. That's what makes a truely great player, not just scoring a shit load of goals, and more fool you if you think that's the sign of a player who deserves to be lauded as arguably the greatest of all time.