Clearly the car analogy is most appropriate here.
It's like ordering a Ford Focus with 1.8t zetec petrol engine and getting all excited, but when it turns up its a 1.8 diesel.
You say hang on a minute I wanted the petrol engine because of its performance characteristics, but they respond by saying the diesel provides better fuel economy and is the smarter choice overall.
You stare at them blankly for a while before losing interest and wandering over to a Manchester garage to admire the Ferraris and Porches.