Speaker identical and yet different

I had let myself an identical speaker of EasyAcc Send and was disappointed as it sounds tinny. My purchase was based on experiences that I could do on occasion and who had actually convinced me that he is to use well. Now I had once researched and found this by Ezreal, the (falls seen from above, the difference on) the road seen more resembled. And indeed, this of Ezreal had a little more bass and met my expectations.

I do not know under what trade names of these mini-speakers still sold. Anyway, there are differences, even if all look the same at first sight.