Ok, my response was a bit “short” in its tone. I know that PT had reduced automation accuracy during recording and bouncing yielded potentially better accuracy if I remember correctly. When it comes to offline vs realtime in Nuendo I was never aware of a difference. Maybe it existed. I honestly don’t know.
I would simply set up an audio track, insert a relevant plugin, tweak it, save settings as a preset, export mixdown in realtime, export mixdown faster-than-realtime, and lastly do an offline-plugin render of the file itself in the edit window. Then compare all in a project. I guess if any two null then they’re the same.