Conference RPI by year:
Year - B1G - Big 8/XII - Huskers Conference Record
Danny Nee
94-95 - .5534 - .5982
95-96 - .5657 - .5719
96-97 - .5656 - .5687
97-98 - .5598 - .5480
98-99 - .5635 - .5614
99-00 - .5891 - .5398
00-01 - .5635 - .5614
Barry Collier
01-02 - .5543 - .5604 - 6-9
02-03 - .5586 - .5791 - 3-13
03-04 - .5468 - .5623 - 6-10
04-05 - .5594 - .5694 - 7-9
05-06 - .5802 - .5566 - 7-9
06-07 - .5693 - .5566 - 6-10
Doc Sadler
07-08 - .5466 - .5663 - 7-9
08-09 - .5823 - .5604 - 8-8
09-10 - .5476 - .5993 - 2-14
10-11 - .5748 - .5726 - 7-9
11-12 - .5769 - .5650 - 4-14 *Huskers first year in B1G
Tim Miles
12-13 - .5772 - .5581 - 5-13
13-14 - .5737 - .5812 - 11-7
14-15 - .5633 - .5848 - 5-13
15-16 - .5515 - .5884 - 6-12
16-17 - .5667 - .5748 - 6-12
Under Nee (for time frame available), the B1G was better four out of 7 years. B1G Average: .5658; Big 8/XII Average: .5642
Under Collier, the Big XII was better 4 out of 6 years. B1G: .5614; Big XII: .5640
Under Sadler, the B1G was better 3 out of 5 years. B1G: .5656; Big XII: .5727
Under Miles, the Big XII has been better 4 out of 5 years. B1G: .5664; Big XII: .5774
Under Miles, the B1G Average RPI has been .5664. Under the other three coaches (all but one year in the BiG XII), the Big XII was .5642, .5640 and .5727 for an overall average of .5665.
So, generally speaking, the B1G was slightly tougher under Miles than the Big XII was for Nee and Collier, though the Big XII was noticeably tougher for Sadler.
Overall, there is hardly enough distinction in the overall toughness to even be brought up.