There's a little divergence at ROTJ. Properly adjusted, the PAL SW and ESB tracks will exactly sync with NTSC SW and ESB tracks, but this is not the case with ROTJ.

The divergence is very small, but noticeable if you watch mismatched audio and video carefully. So technically there are two ROTJ GOUT standards: NTSC, which many older, smaller, projects use, and adjusted PAL, which DJ and Harmy use (due to better image quality on the PAL transfer).

A mismatch in one direction sounds slightly more natural than a mismatch in the other direction, because slightly-delayed audio is more natural than audio that leads the video. i.e. audio derived from PAL muxed with video derived from NTSC, even though it's a mismatch, will sound more natural than vice-versa. So IMO PAL-derived ROTJ audio is better if you have to choose just one version.

Long story short, the GOUT is not one standard for ROTJ, but two. But it's one standard for the other films.