Apples and oranges.
All these companies have hits and misses.
The vision pro can work. But it'll need a couple of software updates and natively support PC VR. Not Mac Pro VR, PC VR, unless they can make their equipment and graphics accelerated desktops attractive for game and social app developers. In other words attractive for the users. The Iphone was attractive for users. It could phone, message, play music, etc... Their VR headset does nearly none of the current sought after applications and nothing more than what already exists.