So far...
B1G 7-1
SEC 2-6

B1G
Washington over Boise State (LA Bowl)
Oregon over James Madison (CFP first round)
Northwestern over Central Michigan
Minnesota in their bowl
Penn State over Clemson (Pinstripe Bowl)
Illinois over Tennessee (Music City Bowl)
Iowa over Vanderbilt (ReliaQuest Bowl)

Loss: USC to TCU

SEC
LSU lost to Houston (Texas Bowl) — 38-35
Missouri lost to Virginia (Gator Bowl) — 13-7
Tennessee lost to Illinois (Music City Bowl) — 30-28
Texas A&M lost to Miami (CFP first round)
Vanderbilt lost to Iowa (ReliaQuest Bowl) — 34-27
Oklahoma lost to Alabama (CFP first round, both teams are SEC so a wash)

Wins: Ole Miss defeats Tulane and Alabama beats fellow conferences foe Oklahoma

So far the SEC only has one win against an out of conference opponent.

Texas currently has their hands full with TTUN with a tied score.

Whoever says the B1G conference isn't as deep as the SEC, I will happily disagree with.