First of all, we only know of a small number of "official"' reformulations, so this is all guesswork on our part. When an expensive designer scent goes "drug store," it's basically silly to say it must be the same formulation. That's not the way the industry works. Red for Men by GBH, for example, supposedly had about 550 ingredients and around 35 naturals, and it smells like it. Does anyone believe that the reformulation is the same? Sure, they tried to do a good job, but so do a lot of other "cheapos" companies (such as Perfumer's Workshop). In the case of Boss #1 (which used to be Boss Cologne), I haven't detected differences that I would describe as major, but then again this one is not a "drug store" scent (unless that happened recently and I didn't notice). Niche reformulations can be just about anything, but now they must follow the new guidelines, so if you liked a niche scent with a lot of oakmoss, don't expect it to smell the same. I suggest getting some samples of new and vintage and studying them over time. Eventually you'll notice differences and you can decide for yourself if it is important to you.