Nebua capsule 3 vs air- which one?

[Wayne01]

I'm looking to purchase a Nebula projector but not sure which one

The capsule 3 runs at 1080 while air runs at 720

I've seen comments that the capsule 3 can connect to an external blue tooth speaker while the air can not but then I've seen others stating the air can

Any comments, what one is the better one, can you tell the difference? Looking to use a 50" screen

Thanks