Here's a comparison of WVU under DH and RR vs. ranked opponents.
Holgorsen coached 8 years (2011-2018) . RR coached 7 years (2001-2007).
Here are their ranked opponents during that time:
Holgorsen:
2011
W at # 23 Cinci 24-21
L #2 LSU 21-47
W at Orange Bowl
Wvs. #14 Clemson 70-33
2012
L #4 KSU 14-55
L #13 OU 49-50
W #25 Baylor 70-63
W @ #11 Texas 48-45
2013
L @#16 OU 7-16
W #11 OK State 30-21
L @ #17 Baylor 42-73
L #16 TT 27-37
2014
W #4 Baylor 41-27
L N #2 Alabam 23-33
L #12 KSU 20-26
2015
L @#15 OU 24-44
L #21 OSU 26-33
L @#2 Baylor 38-62
L @#5 TCU 10-40
2016
L #8 OU 28-56
2017
W #14 ISU 20-16
L @#8 TCU 24-31
L #11 OSU 39-50
L @#3 OU 31-59
2018
W @#24 TT 42-34
W @#15 Texas 42-41
L #6 OU 56-59
L @ Camping World Bowl
vs. #17 Syracuse
So that is 9 wins against ranked opponents. Total 9-17 vs. rank teams--18 of those teams top 15. Total 26 ranked teams played. Also, Holgorsen lost another chance to play and defeat a ranked team in NC State which wasn't played due to a hurricane in the 2018 season.
and Rich Rodriguez:
2007
L @#18 USF 13 24
W @#25 Rutgers 31 3
W @#21 Cincinnati 28 23
W #20 Uconn 66 21
2006
L @#5 UL 34 44
W #13 Rutgers 41 39
2005
L #3 VT 17 34
W #19 Louisville 46 44
Sugar Bowl
W #8 Georgia 38 35
2004
W #21 Maryland 19 16
L #21 BC 17 36
Gator Bowl
L #17 FSU 18 30
2003
L #21 Wisconsin 17 24
L @#2 Miami 20 22
W #3 VT 28 7
W #16 Pitt 52 31
2002
L @ #25 Wisc 17-34
L #1 Miami 23 40
W @ #13 VT 21 18
W @#17 Pitt 24 17
2001
L #8 VT 0-35
L @#1 Miami 3-45
L @#18 SU 13-24
and that is 11 wins vs. ranked teams. Total 11-12 vs. ranked teams. 10 games against teams ranked in the top 15. RR played 23 ranked teams.
To sum up, RR wins against ranked teams:
#25 Rutgers
#21 Cincinnati
#21 Maryland
#20 Uconn
#19 Lousiville
#17 Pitt
#16 Pitt
#13 VT
#13 Rutgers
#8 Georgia
#3 VT
And DH wins against ranked teams:
#25 Baylor
#24 Texas Tech
#23 Cincinnati
#15 Texas
#14 Clemson
#14 ISU
#11 Texas
#11 OK State
#4 Baylor
Both coaches coached their teams to a BCS win.
Holgorsen coached 8 years (2011-2018) . RR coached 7 years (2001-2007).
Here are their ranked opponents during that time:
Holgorsen:
2011
W at # 23 Cinci 24-21
L #2 LSU 21-47
W at Orange Bowl
Wvs. #14 Clemson 70-33
2012
L #4 KSU 14-55
L #13 OU 49-50
W #25 Baylor 70-63
W @ #11 Texas 48-45
2013
L @#16 OU 7-16
W #11 OK State 30-21
L @ #17 Baylor 42-73
L #16 TT 27-37
2014
W #4 Baylor 41-27
L N #2 Alabam 23-33
L #12 KSU 20-26
2015
L @#15 OU 24-44
L #21 OSU 26-33
L @#2 Baylor 38-62
L @#5 TCU 10-40
2016
L #8 OU 28-56
2017
W #14 ISU 20-16
L @#8 TCU 24-31
L #11 OSU 39-50
L @#3 OU 31-59
2018
W @#24 TT 42-34
W @#15 Texas 42-41
L #6 OU 56-59
L @ Camping World Bowl
vs. #17 Syracuse
So that is 9 wins against ranked opponents. Total 9-17 vs. rank teams--18 of those teams top 15. Total 26 ranked teams played. Also, Holgorsen lost another chance to play and defeat a ranked team in NC State which wasn't played due to a hurricane in the 2018 season.
and Rich Rodriguez:
2007
L @#18 USF 13 24
W @#25 Rutgers 31 3
W @#21 Cincinnati 28 23
W #20 Uconn 66 21
2006
L @#5 UL 34 44
W #13 Rutgers 41 39
2005
L #3 VT 17 34
W #19 Louisville 46 44
Sugar Bowl
W #8 Georgia 38 35
2004
W #21 Maryland 19 16
L #21 BC 17 36
Gator Bowl
L #17 FSU 18 30
2003
L #21 Wisconsin 17 24
L @#2 Miami 20 22
W #3 VT 28 7
W #16 Pitt 52 31
2002
L @ #25 Wisc 17-34
L #1 Miami 23 40
W @ #13 VT 21 18
W @#17 Pitt 24 17
2001
L #8 VT 0-35
L @#1 Miami 3-45
L @#18 SU 13-24
and that is 11 wins vs. ranked teams. Total 11-12 vs. ranked teams. 10 games against teams ranked in the top 15. RR played 23 ranked teams.
To sum up, RR wins against ranked teams:
#25 Rutgers
#21 Cincinnati
#21 Maryland
#20 Uconn
#19 Lousiville
#17 Pitt
#16 Pitt
#13 VT
#13 Rutgers
#8 Georgia
#3 VT
And DH wins against ranked teams:
#25 Baylor
#24 Texas Tech
#23 Cincinnati
#15 Texas
#14 Clemson
#14 ISU
#11 Texas
#11 OK State
#4 Baylor
Both coaches coached their teams to a BCS win.