PSO2 and PSO2 NG are both being connected - NG being the updated version of PSO2 - PSO2 has alot of data itsel - hence why they get lost on said data and i nthe new updated version you have alot of stuff to do - while still being able to connect to PSO2 with your character - this is still not a new game this is an update of the older PSO2
It doesn't matter if they are connected, they are separate entities, progression is separate. Microtransactions and a few other novelty items carrying over does not make it the same game. That is just clever marketing. The high level players currently who start at the same time as any other noob will be on a pretty much equal playing field.
It is EXACTLY the same as what GGG have done for path of exile. POE2 is a different game, but you can still play POE1 if you want as they are connected and yes they are upgrading visuals in POE1 to launch alongside POE2 but everyone knows that the one that will be developed further is going to be #2.
Don't be gullible guys, it is clever marketing to keep people invested until launch.