Here are some other head to heads:
Rafter vs Agassi: 10-5 for Agassi
1993 Wimbledon-round of 32: Agassi wins 6-1, 7-6, 6-0, 6-3
1994 Lipton Championships(hard)-Semis: Agassi wins 6-4, 6-2
1995 Australian Open-Round of 16: Agassi wins 6-3, 6-4, 6-0 4 6 0 6
1995 New Haven(hard)-Round of 16: Agassi wins 6-4, 6-2
1996 Washington(hard)-Round of 16: Rafter wins 6-7, 6-0, 6-2
1997 U.S Open-Round of 16: Rafter wins 6-3, 7-6, 4-6, 6-3
1998 Indian Wells(hard)-Round of 16: Agassi wins 6-3, 3-6, 6-2
1999 Italian Open(clay)-Round of 16: Rafter wins 6-1, 7-6
1999 Wimbledon-Semis: Agassi wins 7-5, 7-6, 6-2
2000 Ericsson(hard)-Round of 16: Agassi wins 6-4, 6-4
2000 Wimbledon-Semis: Rafter wins 7-5, 4-6, 7-5, 4-6, 6-3
2001 Australian Open-Semis: Agassi wins 7-5, 2-6, 6-7, 6-2, 6-3
2001 Ericsson(hard)-Semis: Agassi wins 6-0, 6-7, 6-2
2001 Wimbledon-Finals: Rafter wins 2-6, 6-3, 3-6, 6-2, 8-6
2001 Masters Cup final(hard): Agassi wins 6-2, 6-4
Kafelnikov vs Agassi: 8-4 for Agassi
1994 Monte Carlo(clay)-Round of 64: Kafelnikov wins 1-6, 6-3, 6-4
1995 Australian Open-Quarters: Agassi wins 6-2, 7-5, 6-0
1995 French Open-Quarters: Kafelnikov wins 6-4, 6-3, 7-5
1996 Cincinnati(hard)-Quarters: Agassi wins 7-6, 3-6, 6-3
1998 Davis Cup(hard): Kafelnikov wins 6-3, 6-0, 7-6
1999 Canadian Open(hard)-Semis: Kafelnikov wins 6-1, 6-4
1999 Washington(hard)-Final: Agassi wins 7-6, 6-1
1999 U.S Open-Semis: Agassi wins 1-6, 6-3, 6-3, 6-3
1999 Year-end Championships-Semis: Agassi wins 6-4, 7-6
2000 Australian Open-Final: Agassi wins 3-6, 6-3, 6-2, 6-4
2000 Tennis Masters Cup(hard)-Round Robin: Agassi wins 6-4, 6-1
2003 U.S Open-3rd round: Agassi wins 6-3, 7-6, 6-4
Once again Rafter has better overall success even though both have won exactly the same ratio of matches vs Agassi, 1 out of 3 that is. Rafter has beaten Agassi 3 times in a Grand Slam event in 7 attempts, Kafelnikov only has 1 win over Agassi in a Grand Slam event in 5 attempts. Rafter has beaten Agassi twice at his peak in a Wimbledon semi, Kafelnikov's biggest win was over an injured Agassi in a French Open quarterfinal(he strained a hip flexor in that match and could barely move in the last 2 sets), although Agassi has won the French once and Wimbledon once I dont think anybody will deny a win at Wimbledon is a bigger win vs Agassi than a win at the French.