My understanding is that RPi 2 model B is the only RPi 2 available out there.
I have to complain that the RPi version naming is very confusing — for example, I would imagine someone may easily confuse the original RPi model B with RPi 2 model B — they have different form factors. I wish RPi foundation had used a different letter, like RPi 2 model C, so to eliminate the confusion. As is it’s already getting hard to keep up with all the different versions out there 🙂