Final answer:
Facilitated transport is a passive transport process involving membrane proteins, while regular diffusion doesn't involve proteins, both moving substances down their concentration gradients without energy input.
Step-by-step explanation:
An accurate difference between facilitated transport and regular diffusion is that facilitated transport involves special membrane proteins that help transport substances across the cell membrane, while regular diffusion does not involve such proteins. Facilitated transport and regular diffusion are both forms of passive transport and do not require an input of energy from the cell. In both processes, substances move from areas of higher concentration to areas of lower concentration, following their concentration gradient. In contrast, active transport requires energy in the form of ATP to move substances against their concentration gradient. Carriers and channel proteins play crucial roles in facilitated transport. For instance, glucose and ions often utilise facilitated transport to move into or out of cells more efficiently than simple diffusion would allow.