There is graphic mods for both versions of Doom 3. Some gamers may enjoy the pad functionality on
Doom 3 BFG, but with a custom engine
https://dhewm3.org/ or
https://zdoom.org/downloads it may even work on the old
classic Doom 3. However, i would not use a custom engine there, because for a reason you are playing the "original" and the old engine still works great on Win 10.
The updated graphics are good for both games, however, i got the feeling the modders was doing better work on the old
Doom 3 Classic and the lighting got a higher diversity... so it is somewhat the "supreme version".
I think it is not the modders fault, the reason is most likely because
Doom 3 BFG is a "normalized" version with a less valiant lighting but to some gamers "more accessible". The old Doom 3 Classic was actually a pretty dark game with a pretty playful attitude when it comes to lighting-effects. Although, at the time they updated the old Doom 3 to the more "console friendly" and "mainstream-consumer-friendly" version, known as Doom 3 BFG including 2 Classic-Versions, they was kinda stripping out the more "feisty" part of the Doom 3 Classic; i assume for most of the fans it was rather a nightmare. However, both versions are good games... and with pretty good graphics, when updated.
For Doom 3 BFG, the best graphic mods i found so far is:
Ultimate HD V. 2.1, remember to update to V. 2.1.1
https://www.moddb.com/mods/doom-3-bfg-ultimate Wulfen Texture Pack
https://www.moddb.com/mods/wulfen-texture-pack Generally the Doom 3 BFG mod is still missing many improvements, so this is not nearly finished yet. I was simply installing the Ultimate HD mod first. Unpacking Wulfen Texture Pack after and then overwrite the Ultimate HD install, so i should have to most complete version we got available yet.
Actually i had an issue with he engine, because it was malfunctioning with the one provided with the Ultimate HD mod. Most likely because my game is a newer version and the mod still is using a old custom engine. So i got me the updated custom engine; overwriting the old engine and then the game worked for me.
The newest custom engine can be found here:
https://github.com/RobertBeckebans/RBDOOM-3-BFG Which seems a pretty advanced engine, but of course it may lack the "original feeling". simply perfect for the BFG because there is no such intention.
Screenshot comparisons of a updated game (newest mods for both):
Doom 3 Classic:
https://ibb.co/Ydz7kHm https://ibb.co/DQF05Cw https://ibb.co/2tynVjb https://ibb.co/mvmYbSF https://ibb.co/F7Dk5br https://ibb.co/0KHNLyR https://ibb.co/cwt6Kr0 https://ibb.co/fY4t03m https://ibb.co/XZhXDzF https://ibb.co/6DfP7bR Doom 3 BFG:
https://ibb.co/nBzkcLD https://ibb.co/D5J7BZq https://ibb.co/DzFcJtN https://ibb.co/1fNPmCH https://ibb.co/jzLSjFJ https://ibb.co/mSzTrpw https://ibb.co/6rKvWvX https://ibb.co/tzL43nJ https://ibb.co/3k4RQZX https://ibb.co/THTgdNV