Have never used the OG BR 540 obviously because of its price. But Rouge 666 takes you into a beautiful lane of sweet, candy vibes, not bubble gummy. The smell's intoxicating and leans more on the masculine side. The longevity is stellar, 10 hours easily and on clothes you can smell it even on the next day. The projection is good in the 1st hour and tapers down as time progresses and mostly remains a skin scent or may be I go nose-blind to it, don't know. But for the price-point, you can't really ask for anything else. MK is great at what he does. I wish him luck and the very best!!!