Could it have something to do with the human-youkai gauge?
In the first trial, you had above 85, while in the second, it was 68, which is below 80.
Upon a second look, I'm fairely sure this is the deciding factor. Again, in the first run, after you defeated the spellcard, your gauge jumped to 100% youkai for a second, then switched to 100% human. In the second run, it first jumps to 0% (neutral) and then to 100% human
Edit: Nope, looked through my replays and this isnt it.