Yes; humans are primates.
Because pigs and humans are mammals, their brains are relatively similar. The basic structures in the brain are the same, but the size of the structures may differ.
Since a pigs and humans are mammals, their brains are basically the same as far as structures. The size of the different structures differs, but the basic composition is very similar.
I suggest you review your taxonomy. Pigs may be an a different twig, but the evolutionary branch is the same. Both humans and pigs are mammals.
Its a little bigger.
Only pigs.
same as a humans
Same DNA as humans
Most mammals are covered in hair (or fur - same thing). The exceptions are marine mammals, pigs and to a large extent, humans.
Their brain size was the same as modern humans.
no because animals are the same with human and animals don't have life/spirit.
It's the size of your fist maybe not even.