Shannon

I live in Mexico City and have been observing our hummingbirds at the feeders that we put out.  From what I can see, we have 2 types.  One that I had heard is called Berylline, that is the smaller more copper colored one and the other I thought was called a Stripe-Eared but after this first part of the hummingbird course it looks like it is a Mountain-gem..can anyone help me to identify them for sure?