Minsky and Papert showed that computing XOR requires a 3 layer artificial neural net: Input, Hidden Layer, Output - which has 2 layers of weighted connections.

This[0] research shows a single neuron can compute XOR, thus the artificial neuron has less computational power than a real one.

[0] - https://www.reddit.com/r/MachineLearning/comments/ejbwvb/r_s...