Trading a Old Cartridge in for a New Replacement Cartridge will get a person a Cartridge with the Companies latest design for the model.
The New Cartridge is highly unlikely to not be the same as the design for the Olden Cartridge.
A refurbishment of a Cartridge sent to the Manufacturer for this purpose, is also unlikely to be a returned Cartridge with all the same parts as the original.
There is small print that clearly states equivalent parts are to be selected.
I doubt if anybody from R&D has spent too much time learning how to optimise the equivalent parts into the Olden design.
What the Customer gets is the satisfaction the Cartridge in need of a Treatment was undertaken by the original producer, maybe not the original assembler or original parts to be replaced.
With a Third Party Service, there is the definite outcome parts selected will be equivalent. There is also the outcome where the selected parts are in many cases well understood and known how to optimise their usage when added to a Cartridge.
The Third Party Service does have its advantages, and should not be overlooked.
