I see it going 1 of 2 ways: 1) Valby and Tuohy both run the 3k/5k indoors, and 5k outdoors, with Valby winning one of their matchups. My shot in the dark prediction is Valby wins the 5k by a little bit over Tuohy, then Tuohy comes back and destroys the 3k field, then there's a big buildup to outdoors to see who wins the 5k, with Tuohy ultimately coming out on top.
2) Both run the 3k/5k indoors, but Tuohy runs the 15/5 and Valby runs the 5/10 outdoors. In this scenario, I see Tuohy winning 15/3/5/5 and Valby winning the 10. Every Valby and Tuohy race would come down to the last 50m though.
Bonus predictions that no one asked for: Both go sub-15 against each other in at least one race. Tuohy goes sub-4. Valby drops a 4:05. Both make a 2023 US team. Both make the 2024 Olympic team. Valby gets enough points for Florida to win a title. OP stays single for the rest of their life.