Micro USB is just the one on the right, only one version that I know of. The downstairs charger is a micro USB Blackberry charger, upstairs Samsung micro usb, and HTC micro usb, they all fit every phone that we've had across multiple brands for years now. Pretty much anyone who comes to visit can plug their phones in for a quick charge.
Gone are the days of every phone having a different plug, heck even one brand would have multiple charging ports, it was ridiculous. If you went into a cell phone store with a micro usb charger, it would plug into any phone there with the exception of an iPhone. Even my tablet takes the same charger. My last two phones were used and came without a charger, I just used the ones that I already had regardless of the brand.
Yes, cell phone companies and stores LOVED to charge you $30 for a new car charger or spare every time you bought a phone. One thing that you have to look out for, is if your phone is in a case, some of the micro usb with larger plastic heads can have trouble, even though the plug itself would work.