Wow, seeing the graph confirms what I am hearing. Main complain I've read is that they lack bass, I don't know what those people are listening to cause these hit good and sub-bass is very present, more than No 3 for example, voices feel a tad warmer too. They don't have the same resolution and clarity but the spacious sound and decent soundstage make up for it. For under $10 I haven't heard something better, hell I even prefer them over some of my multi hundred $ IEMs, comfortable, pleasant signature and cheap .
Last pair I've bought was from seller
webbuysource on eBay and they were originals. I would try to find some open pack from the Samsung bundle or something like that if not. I also had a fake and I's very obvious from the sound, very muddy. compared to my other 3 gen buds I have. Visually it looked almost identical, the only difference I could tell was the finish on the wire controller, on the original is pretty crisp and the pimple well defined, on the fake the molding is a little more rounded around the edges and the pimple is not as pronounced. Seems like the fake now has rubbery earpiece and correct jack so I don't think the guide from the Samsung site longer applies.