Just a quick comparison of TCU and OSU:
Best win:
TCU's would be Kansas State at home.
OSU's would be Michigan State on the road.
Edge: OSU
Losses:
TCU lost to Baylor
OSU lost to VT
Edge: TCU
Common Opponents: Minnesota
TCU: Won by a wide margin at home
OSU: Won a closer game on the road.
Edge: Draw.
Other quality wins: Against teams currently in the top 25
TCU: Oklahoma
OSU: None
Edge: TCU
Remaining big games:
TCU: Texas
OSU: Wisconsin
Edge OSU
Overall:
If both teams win out, it will be close. The lack of a championship game might hurt TCU, or rather, might give OSU a big enough boost to overtake them.