The solid lid of a hard-top freezer contains the same foam insulation as the walls, so the cabinet loses far less cold through the top than a glass-lid model. That makes hard-tops the better choice for storage: they hold temperature longer when the power goes off, use less electricity for the same volume, and can be set colder.
Because nobody browses a hard-top, it usually lives in a storeroom or back area. Look for a strong lid hinge that stays open while loading, a lock if stock is valuable, a drain for defrosting, and internal baskets that make rotation practical. The lid top can also be used as a temporary surface, though heavy loads may damage seals.
An ice cream distributor in Nagpur might keep a row of hard-top freezers in the godown as buffer stock, refilling glass-top display freezers at retail outlets from them. During a long power cut, the solid lids help the stock ride out several hours if nobody opens them.