So in a quick brief. What's new in the special edition to the original?
For all we know;
-Playable Vergil, Lady and Trish. Vergil plays the whole campaign on his own while Lady&Trish shares it like Nero&Dante
-Opening and ending cutscenes for each new game mode(Vergil Game, Lady&Trish Game, in total 4 new cutscene)
-One alternate costume and one palette swap for each character(Lady&Trish's alt. costumes are pre-order bonuses though and will be sold separately after release)
-Improved textures and visual effects
-Speed is now activated instantly
-Autosave feature
-Proud Souls are earned faster now
-New concept arts
-Slightly tweaked gameplay
-Steam achievements and trading cards for PC
This is all the confirmed stuff. There might be some more Capcom didn't announce yet.