Quest is not comparable.

Carboard is shitty stereoscopy viewer with barely functioning 3DoF tracking, which might drift randomly, depending on the phone. And also screen completely not suited for VR with ghosting and shit.

Quest on other hand is properly (as much as inside out can be) 6DoF tracked headset with controllers, which can have standalone games (with 2007 mobile game graphics) or properly streamed oculus and steam vr games (but with h264 compression of the video stream, changing dark scenes, scenes with a lot of detail into mush and adding delay)