So... we can still do both test of courage event and taste test event, just on different days? Or we can only pick one?
You can only choose one or the other if they are on the same day. In the original Unofficial Torahiko route, the author moved certain events that Torahiko was in around so that every event involving him could be seen, at the expense of taking away player control. The only two choices you would be given are who you sit next to at the Welcoming Party, and who you spent time with at the beach.
I rearranged everything back to better fit with the rest of the routes, and even had to make flags for certain references or events. Because of this, there are slight differences later in the game depending on which event you pick on Day 6 involving Torahiko, and the choice you pick during. For the taste test, Hiroyuki can refer back to it if he enjoyed it. Whereas with the test of courage, your choice could make Nanafuse appear later in Torahiko’s route.