What is the difference between me and a rock?

[Angrboda]

Two main things:
a) a rock has less potential energy,
b) a rock cannot transform energy from outside itself into work or potential energy at anything but a miniscule fraction of what you can,
therefore, you can support more processes, more complex processes, and for a longer time.

Eventually, because of your composition, that will likely end as well in a rock like state (though not necessarily). In a word, the difference is energy.

Pointing to the different possibilities implicit in your structural composition is certainly valid, but without energy that doesn't matter. (There's a joke that a mom is a device for turning cheeseburgers into people. And it's true, a mother is taking in energy or potential energy, and turning it into a living being.)