Originally Posted by Askartus

NJ 467 has 5 coaches from Zurich to Vienna with the numbers 303 (seats only), 304 and 306 (couchette coaches with up to 6 people), 307 (sleeping car, some with bathroom), 308 (sleeping car).
Coach 306 is planned to be exchanged for number 305, which is actually a renovated couchette coach with only 4 people per compartment.

So your compartment might look something like the pictures in this german blog: https://traintracks.eu/nightjet-liegewagen-comfort/

As I heard, ÖBB is replacing the carriages on all nightjet routes one after the other with refurbished models - that is why during the booking process it might be unknown which coach will actually run.
I took my information from https://www.vagonweb.cz/razeni/vlak....azev=&rok=2024.