I’ve never been on a full 90 degree tilt coaster but even the slightly sloped one I’ve been on actually gave me more of a thrill than any holding brake on a B&M dive coaster (like Valravn). Being held at 90 degrees and then suddenly being dropped is going to be something unlike anything you’ve experienced on a coaster… This will be on the level of a drop tower. One of these has existed overseas for decades and I’ve been dreaming of riding it… I seriously can’t wait.
In the case of the impulse coasters with the holding brake that’s an example of the thrill but I think the distinguishing factor is that your adrenaline is already going by time you hit that point… With a tilt coaster you’re going to mix the suspense of a dive coaster with the 90 degree hold of the brake on the 2 impulse coasters that have/had them.