I have a'regular' DRSD and a MBW DRSD so I feel decently qualified to give a straight comparison. The biggest difference is one that cannot be described easily and that is the 'feel' of the watch. I worked in a vintage watch dealer in London and was very used to handling all the famous vintage rollies, Subs, SD's, Princes, Bubblebacks etc. When I got my 'regular' DRSD I did not know the differences from the gen (I do now!) but the one thing that stuck out for me was that it felt fake. I'm sorry to be vague but that's the way it is, it's lots of little details, quality of steel, lubrication, polishing, how the clasp works etc etc, when I bought my MBW it 'felt' alot closer to the genuine article - I know the details that are off and I'm going to have it fully modded and I appreciate that you might not want to bother with that but if the 'feel' is important to you then I would say get the MBW. Remember the old saying 'Buy cheap and you buy twice'. This is absolutely true in my case but then I am a bit of a stickler for detail so it really depends on what type of person you are, if you know that small details will irritate you and put you off from wearing the thing then MBW it is. If you don't really care about stuff like that and just want something to look the part then definitely go for the regular and buy one with an asian movement to save money because it will do exactly what you want, it will look the part but nothing more. I hope this makes sense and is of some use to you. All the best with your watch buying future.
Dieselpower.