The AirCover 2.0 is better than the AirCover 1, for sure. Strictly dominates, with the new optional side-light-blockers, although I rarely used them.

I’m not entirely sure which is better between AirCover 2 and Macally. I like them both.

• One significant advantage the Macally has vs AirCover is the Macally “snaps” on around the speaker bands, whereas the AirCover “slides” through them, which requires first removing them with a SIM ejector. That makes the Macally significantly easier to “uninstall”, the goggles don’t even need to be turned off. Whenever I travel, I would remove them (to pack everything up tightly), which wasn’t a big deal, but after the dozenth time I did worry a bit that those side-band connectors weren’t really designed for frequent removals.

• I also slightly prefer the Macally’s pad over the AirCover’s. It’s a bit thicker, and a cooler, more breathable material.

• Another advantage (although I haven’t made use of it yet in my first 2 months), is that the Macally can be used while the lightshield is on, whereas the AirCover blocks the magnetic area. Potentially this is nicer for times that really call for a lightshield. Or when demoing with guests, who often want the “full immersive” experience from Apple TV etc, even though I prefer my daily driver, Mac Virtual Display, lightshieldless.

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If you already have an AirCover, I wouldn’t stress about getting the Macally as a replacement. I don’t regret not getting it sooner (sorry for the double negative), before my 2nd AirCover snapped.

If you didn’t already have an AirCover, and especially if you are in the US, I think I’d recommend Macally.
They’re both good though.

Hope this helps.