New Trial Mountain appears to be an entirely new track, 'inspired' by Trial Mountain. It's as if someone had visited the abandoned Old Trial Mountain, somewhere deep in the forests of Polyphony, and decided they'd build a tribute in the 'States.
Some corners are remarkably similar, but this is a purpose built race track, designed from the start for racing at up to Gr.1 speeds (and beyond), world-class online competition, and appealing to nostalgia.
Old Trial Mountain did not have these goals in mind, it was designed to be a track to hold far less than 20 cars, n300 class on average, and excelled as a place for hotlapping, where one could appreciate the flow of pulling the many paired apexes together, and enjoying the thrilling ascending tunnel, maybe even taking a short flight over the crest into the latter half of the back straight, soaking up the beauty of Komorebi...
In short, New Trial Mountain is like a reorchestrated live recording of a song I love, I'm thrilled they're playing it again but the vibe is totally different and I don't want to hear this version every week.