I didnt mean that bms is better in quality or anything like that. What i mean is that BMS made far bigger step to update the game engine than TW did from sf1 to sf2. BMS still looks old but its amasing what they did with such old game engine. 
TW is a company and i have to say that i personally was completly disapointed with sf2 progress overall. Beside new terrain(nothing amasing actually) that is available only SF2NA the game is nothing new was more of rippoff to customers. Thats just my opinion, i know many see it different to but they could do it better.  
The rendering engine should simply be rewritten at some point or made completly from scratch as for the quality that it offers fps is far from where it should be. 
While some think that simply C++ coding could do the thing is wrong. Rendering engine here is at the end and it seems that TW didnt want to go again from zero or completly redo it but i doubt to that source code will be available at any point now, especially as they are still in bussines. 
  
If there are some C++ guys around im sure they would think of rather doing something new, it would be there game afterall to and with game engines like unity or unreal far more can be done with modern standarts and far less work.