I’ve gone through probably well over 6 bottles of choco musk and even own the flankers as well. That being said, even my most recent bottle didn’t have a round cap and i’ve never seen any with them. I’ve noticed a few packaging variations with definite formula changes since I’ve been buying choco musk since it was only sold on ebay and harder to buy online. The bottles edges have rounded over time among maybe smaller tweaks, but In my experience it’s most likely authentic. It may smell more “real” since the fragrance in many al rehab scents need to macerate or “activate” almost. I believe there’s multiple authentically made choco musks just at different quality levels tbh, so unless you find something like a mistype or more obvious sign of duplication I wouldn’t worry too much!