I haven't checked the stats but I think the numbers would be very close this season. Ronaldo's goal percentage to Real's total and Griezmann's to Atletico's total.
Ronaldo has 16 of a total of 23, which comes down to 69% of the goals.
That's still a pretty big difference.
And you can add to that the obvious fact that Ronaldo has scored more than double the number of Griezmann's goals, including a hattrick in a game his team needed to win 3-0.
Obviously both are important, but it's safe to say that Real would be nowhere without Ronaldo.
EDIT: by the way I'm a huge Griezmann fan, I think he's one of the best strikers around and I rate him very highly.
