Plus, on top of the above point, this version also aims to fix bugs and, to some extent, art goofs present in the original game. Being run from the original files rather than through the SE's interpreter, it also avoids any bugs that are the fault of the interpreter executable. There's also corrections to text etc. such as instances where the makers of the SE forgot to change some lines to match the altered dialogue; plus the ability to play with the original unmodified dialogue if you want, something that is not possible in the SE. Also, the ability to turn the narrator on and off, depending on whether the narration bugs you or not.
Overall, it just aims to be a 'complete' version of the classic version of MI2, with voice acting, as few bugs as possible and more customisation options than the SE's classic version allows. = )