) better effects by phrozo (improved weapon effect lightning, decals, smoke) - fixed some bugs, added improvements and made them work with BFG ) better texture resolutions, higher polycount for models - merged some texture/model packs, see credits
Ultimate has additional effect, AI, and weapon improvements. both using the same texture packs and high poly models. The choice of the mod depends on your own preference. No, achievements don't work with any mod that uses a seperate.
