If both Dolby Atmos and 360RA are available for same track, which is downloaded?

[hell001]

Which one of these take preference?

Also a side question, is every track available in AC-4 also guaranteed to be available in EAC-3? (In other words, no AC-4 only Atmos tracks on the platform?)

[OrfiDev]

Are there even any tracks on Tidal that are available in both formats...?

[Dniel97]

That is currently not possible in Tidal infrastructure, it is either Dolby Atmos OR Sony 360RA. Every Dolby Atmos track should be available in both formats AC-4 and E-AC-3 JOC.

[hell001]

Are there even any tracks on Tidal that are available in both formats...?

It depends on what you mean by "track". If you mean the TIDAL-assigned track ID, then I haven't come across any (supports @Dniel97 's answer, thanks for the info BTW). If you otherwise mean just the song, then yes (1, 2) - but these are technically different tracks as far as Orpheus goes. So the main takeaway is it's either one or the other. Thank you both.