Just to clarify as this is an obviously confusing issue. One is a kit to fit your car, the other is a kit that won't fit your car.
Different part numbers imply that they are actually different kits and the seller isn't just trying to look like they have heaps of different options to choose from. They do actually have different options to choose from.
However choosing the kit that won't fit your car would be a silly. But you have that option should you choose to take it.
As for the actual differences. If the core is the same then that would have to mean that the pipework is different.