If that is your only train journey, no a Global Pass won't be good value.

Use tickets.oebb.at to book this night train : departure 19:42, arrival 14:05.

- a 3-people sleeper compartment costs 323€.

- 3 people in a 6-people shared compartment costs 268.40€.

There are more night trains available with a change in Budapest if you want to arrive earlier : check CFR's website.

Night trains are very popular so book well in advance