When it says large textures or small textures, which is better? performance is no concern, I'm currently operating at half Anisotropic filtering capacity and 3/4 AA capacity. just wanna know which is better graphic quality.
The name is kind of confusing. Large really means High Resolution or More Pixels per Sq Inch. I guess they are using Large to refer to the file size. It does not mean the Textures are larger in physical size on the screen.
Also, you may see Hi Res Texture packs come out for this game as a mod (they have them for FO3, so it is just a matter of time). They can double or quadruple the amount of Pixels used to create the Textures. However these Textures have so much detail in the same amount of space that they can approach photo-realistic in look and feel. These can drag down the performance of even a high end rig.
Bottom line, if your rig can handle it, use the Large Textures that come in the game. If you want to try the community made Hi Res ones, then be prepared to remove them if the performance suffers too much for you.