2010:
Steyn: 11 Tests, 60 wickets @ 21.41, SR 39, 4 5w, 1 10w
Anderson: 12 Tests, 57 wickets @ 22.96, SR 48.7, 3 5w, 1 10w
Swann: 14 Tests, 64 wickets @ 25.96, SR 54, 6 5w, 1 10w
Harris: 10 Tests, 23 wickets @ 50.65, SR 120.3, 0 5w
Last 3 calendar years:
Steyn: 29 Tests, 156 wickets @ 22.36, SR 39.8, 9 5w, 2 10w
Anderson: 36 Tests, 143 wickets @ 28.23, SR 55, 7 5w, 1 10w
Swann: 28 Tests, 126 wickets @ 27.66, SR 56.8, 10 5w, 1 10w
Harris: 27 Tests, 73 wickets @ 42.57, SR 91.3, 2 5w
Steyn's ahead of Anderson, no doubt about that. But Swann is so much better than Harris the difference is laughable - this year he's literally been twice the bowler Harris has been. Anderson-Swann is a better pairing than Steyn-Harris, easily.