As others have said this is still the best way to play Big Brother, I don't see any benefit to playing the original when this has the entire base game ported over. can't speak on the extra content as I'm not big on ntr, but the fact that we have a completed version of this game in renpy, with all the mechanics and branches working is an amazing feat from the developer.
NOTE FOR NEW PLAYERS: I strongly recommend keeping NTR turned on, even if it's not your thing. Disabling NTR will lock you out of progressing and completing many of the original quests later on. This wouldn't be a problem if it only removed the quests that were purely NTR-focused, but it doesnt. You'll miss out on a lot of the original content, and since you can't reenable this option you'll have to start over.
NOTE FOR NEW PLAYERS: I strongly recommend keeping NTR turned on, even if it's not your thing. Disabling NTR will lock you out of progressing and completing many of the original quests later on. This wouldn't be a problem if it only removed the quests that were purely NTR-focused, but it doesnt. You'll miss out on a lot of the original content, and since you can't reenable this option you'll have to start over.