I divide it into technical level and qualitative level.


Technical level:


1-9 Retro and 10- to today modern. The key differences are the voice acting and full 3D graphics, facial impressions, modern sound.


The quality level basically only describes FF4-FF12, as the mainline series has delivered outstanding results here. Although FF10 and FF12 already had significant weaknesses, the overall experience was still good enough. From FF13 on, this was over.