No, that's stupid. TOS, TAS, TNG, DS9, VOY, ENT, and Picard are all in the same timeline, same universe, same continuity. Stop doing gymnastic contorting to rationalize something different just because a ship looks different from one show to the next. Why did the Enterprise change from episode to episode of TOS? Sometimes it had globes on the back of the nacelles, sometimes it had a grate (sometimes in the same episode!). The two different filming models were different, as well. Was each scene in a different universe? etc... etc... etc...