They don't have to be the same, but you should know what are your goals are.
Rip describes the Texas Method as increasing strength from week to week, and he recommends alternating presses and bench presses, so that one week you would do presses on Mon and Fri, and the next week bench press on Mon and Fri.
It seems it would be difficult to progress each week (the presumed goal of Texas Methodists everywhere), on all three of the lifts you describe, so you should decide which you want to concentrate on. If you wanted to use some different exercises, the light workout on Weds, is probably a better place for it (E.g., in PPST 1 (but not 2), push presses are used as an alternative). If you want a big bench, benching twice a week is going to be more effective than just once a week.