MicroUSB is standardized, what you are referring to is MiniUSB and i've seen the chargers you're referring to. A manufacturer that does that, well. sucks.
MicroUSB there's no real way to make them any different, with the exception of I saw over the last few days when i was looking for specific gender changers and extension cables where the MicroUSB for USB 3.0 had a 'notch' or indention on the 'top' of the plug which i believe means that USB 3.0 'only' devices wouldn't work with USB 2.0 MicroUSB cables. Thats just a theory. Everything released so far that is MicroUSB is the same form factor and the only difference is the cable quality between both ends, which really doesn't matter all that much.