Likely what's happening if you choose 'High (2 GB),' 'High (4 GB),' and 'High (8 GB)' is you're getting served the same textures, but the game is reserving more VRAM to stream them in-and especially if you're on an SSD, that's a nonissue.
There are also diminishing returns after the 'High (1 GB)' setting used for the 'Graphics Priority' preset. Texture Quality has very little impact on framerate, and any modern GPU (including the lowly GTX 1650) is capable of running the 'Balanced' profile error-free, which utilizes the 'High (0.5 GB)' preset and looks totally fine.
The good news: None of it really matters, past a certain point.
