Normal didn't have the Stutter or Audio "pops", and Network was the best option if both PC's aren't time synced since, as the name implies, it's using your Network to time the Sync. This is/was the best options.
However, currently Source Time with Low Latency since for a while OBS and NDI where a nightmare to run (the desync was almost instant, it constantly stuttered, had to reset my router after every stream, starting a new software would stagger the whole stream and required restarting OBS) and stuck with it for now.
I haven't tried going back because I don't know how well they will work.
You can try recording something small on the second PC for a couple of minutes, you might get lucky and it works for you perfectly.
PS: You can try Output Filters, those bypass most issues but they require extra power on your second PC and a very good Network system, otherwise OBS/NDI will disconnect your second PC from the internet constantly.