Comparing the capacity of brains and silicon hardware does not work by multiplying synaptic resolution with synapses etc., but by estimating the amount of determinism that can be extracted with respect to a best effort computing paradigm.
Reprogrammability does not obviously matter, perhaps you often only need to learn once? Perturbability is indeterminism. Compressibility is almost the inverse of what you are looking for: a noisy transition function is both harder to compress and less useful.