Hello.
I have a question. Why Pro mini has 8 analogs pin and Uno only 6? In documentation is that pro mini has only 6 pins but on board are 8. Does Uno have 8 analog pins too, but with diferent name?
Thanks for answer 
The SMD package of the ATmega328 has enough pins to break out the 2 additional analog inputs.
Those additional inputs are ONLY available for use as analog input. They have no digital hardware behind them.