Conveyor Belt Sushi would tend to be less fresh
Logically speaking, given the fact that sushi will stay on the conveyor belt until it is partaken to be consumed, it can be slightly less fresh as if it hasn't been covered, it has been exposed to the air.
In conveyor belt style restaurants, you can normally always ask the sushi chefs for special orders, and it is normally advisable to do so.
Steve
United Kingdom