How each one moves
A rolling shutter coils into a drum above the opening. A sectional door has hinged panels that travel along tracks and rest overhead under the ceiling.
Where each fits
Rolling shutters are compact and economical, so they are common for shops, godowns and service bays. Sectional doors offer better insulation, a neater look and quieter running, which suits garages, showrooms and industrial bays.
What to check
Rolling shutters need headroom for the drum, and sectional doors need headroom and side room for tracks. Consider insulation, noise, security level and how often the door is used.