How many different kinds of hats with entirely different names do you own? I have a sun hat, a toque, a helmet, a rain cap, one of those ones with flaps that I don't know the name of but probably has one, and I'm sure half of you own a fedora and a trilby.
I see your point and I think the hats are a better example than the trousers comment below. Especially when it comes to traditional clothing, there's a ton of different, very specialized hats with special names and for a 3rd person might be all just 'hats'. Thanks for the analogy. :)
Aren't these just synonyms for the more or less same thing and not different concepts that just (almost) look alike? The pure existence of this guide implies that the nuances between these kinds of clothing are so important that you should be able to differentiate them. And Hijab and Shayla seem to me almost identical. The cloth is placed slightly different but that might have happened also by the wind or so.
There could be very specific nuances to each synonym for pants as well, and we could debate what exactly the difference is between briefs and slacks. Jeans is a good example of this, its the exact same style of clothing as other pants, its just made with a very specific textile. If you saw a photo of bleached jeans and white pants, you would have the same complaints that you have with OPs photo, you couldnt tell the difference.
OK, that's a valid point that I agree to. But then this guide is not a 'cool guide' because it doesn't give me a clue on what's the relevant differentiator between the different things. If it's properties like textile, color etc. and not just the cut, then there should be some kind of indicator, explanatory remark or visualisation of that.