Both 2023 championships are 3rd/1st seed. There's been 6 others since 2002:

2003 AFCCG (1) NE 24 > (3) IND 14
2003 NFCCG (3) CAR 14 > (1) PHI 3
2007 AFCCG (1) NE 21 > (3) SD 12
2016 AFCCG (1) NE 36 > (3) PIT 17
2017 AFCCG (1) NE 24 > (3) JAX 20
2022 AFCCG (1) KC 23 > (3) CIN 20

— Lee Sharpe (@LeeSharpeNFL) January 22, 2024