It doesn't matter where in the Universe you are, if a biological being is given time to evolve, the end result will always end up looking similar to a human being; head, neck, fingers, 2 legs, front-facing eyeballs (universal mathematics of evolution). Physicality wise, it is the optimal hardware formation. Why 2 front facing eyeballs and none in the back of the head? Forces you to socialize and make a friend to watch your 6, it's all built in for a reason.
The brain, or software, can configure in many ways depending on how the synapses bond together. Certain shapes and formations (algorithm) are more efficient than others and improves over time to provide more storage space and processing power.
Did humans eventually evolve from a certain tribe of monkeys though? Your guess is as good as mine because as I said, it all leads to the same hardware.