define durability and realibility
Answers
On the face of it, I would say there is very little difference - semantics really, as the durability of a product or service implies it is reliable - will perform as expected, for the duration expected by way of engineering and marketing.
However, there is an enormous program to design, engineer and manage reliability in items that perform physical/virtual functions. This includes mechanical (physical movement and wear from its friction), signal (data transfer in sound wave or through circuitry) and electrical, which may have finite lifecycles from use of the item.
On the other hand, the term durability suggests to me the lifecycle of an inanimate item, like a piece of clothing or furniture, which is subject to treatment from use or exposure to the elements.