(i) Both of them require specific membrane transport proteins.
(ii) The rates may reach a maximum following saturation of the transport proteins.
(iii) They are highly selective for the substances they transport.
Facilitated Diffusion :
It is passive process and does not require energy.
It occurs following concentration gradient
i.e., from higher concentration to lower concentration.
Active Transport :
It requires energy.
It can occur against concentration gradient,
i.e., from lower concentration to higher concentration.