Rogie vs. Rafa by surfaces....
In clay finals: Rogie is 9-10 and Rafa is 25-2.
In hard court finals: Rogie is 39-7 and Rafa is 9-6.
In grass finals: Rogie is 11-1 and Rafa is 2-2.
In carpet (indoors) finals: Rogie is 2-5 and Rafa is 0-0.
Rogie has lost a bunch of carpet finals, but unlike Rafa has played in 7 carpet finals.
By far Rogie is the dominant player in the finals of hard court and grass courts.
By far Rafa is the dominant player in the finals of clay court events.
As for career record by surface...
Clay: Rogie is 141-42 (77.05%), Rafa is 179-16 (91.79%).
Hard: Rogie is 393-84 (82.39%), Rafa is 177-56 (75.97%).
Grass: Rogie is 88-12 (88%), Rafa is 31-7 (81.58%).
Carpet: Rogie is 50-19 (72.46%), Rafa is 2-6 (25%).
Overall: Rogie is 672-157 (81.06%), Rafa is 389-85 (82.07%).
To play as many matches as Rogie, Rafa needs a 283-72 record to tie Rogie (where Rogie's at right now). Although Rafa has won 1.01% more of his career matches, let's not forget his sick dominance on clay winning nearly 92% of his career matches on clay. Rogie's about 6.5% better on both hard courts and grass courts and is about 48% better on carpet (few matches are played on carpet anymore so it means so little). The biggest difference is on clay where Rafa leads by about 15%.
Truth be told, outside of clay, Rafa is only good, but not great. Whereas Rogie is great on all surfaces. When Rogie was 23 years and 4 months old he had only 22 titles, so he won 39 more (remember he has 61 to date) since being the age Rafa is now. Yes Rafa is 14 ahead with his 36, but bear in mind that Rogie's won about 2/3 of his titles from 23 years and 8 months until now at 28 years and 2 months. I don't think Rafa's going to win another 39 titles between now and when he's 28 years and 2 months (August of 2014). At this rate Rafa likely won't even be around by then.