[jayd16]

Hololens (and most other AR headsets) is an additive display on a transparent waveguide. The Quest2 is passthrough video on a full face LCD.

The display technologies are fundamentally different. HL is additive so you can't show blacks. You have to make due with tricking the eye with grays. Its a lot harder to get realistic lighting on objects. The FOV on the Quest2 is much better.

The Quest2 is a couple SOC generations ahead of the HL2.

The Quest2 has a much bigger install base.

The Quest2 is 1/10th the price.