This year (12-18 hrs, undergrad, tuition+required fees):
SMU: $64,460
TCU: $57,220
BU: $55,044
These gaps track over the past 20 years with TCU about half of a 1-year hike ahead of Baylor and SMU about a 2-year hike ahead of TCU.
But hardly anyone is paying full freight at any of the 3.
FWIW, full-time tuition and fees at UT Austin is $13,576 for residents. $48,712 for non-residents.
I applied to and was accepted to all of UT, A&M, SMU, and TCU in 2003, and I absolutely made the right call going to TCU and loved every bit of my TCU experience. But you’d be hard pressed to show me how it would be remotely responsible to choose TCU over UT today at a $43k/yr premium.