IMO the big advantage of AirTags will be that you can locate them if they're near anyone with an iPhone, but Tile is limited just to their own users. Anecdotally I don't know anyone who uses Tile but I know plenty of people with iPhones.
The fact that any iPhone (> 11) will ping home with the location of one of these is the croudsourced killer feature in the making for 2 years before release.
I'm in for a 4 pack.
I have Samsung, my wife has Apple...so we're sticking with Tile.