Depends on your point of view, I guess. I always saw Blu-Ray as the superior format vs. HD-DVD.
I had both. I found the video quality the same, but the menu system on HD-DVD was faster and far superior to those on BluRay discs, even to this day.
Fire up the "Eagles Farewell Tour" HD-DVD and watch that menu and marvel at its perfection. BluRay cannot come close - at least I've never seen it come close.
To each his own I guess.