Which is different? Did you take one of your rotors to NAPA to see if it will fit over their hubs?
What do you mean by "their hubs will not fit inside their rotors"? My understanding has been that the differences are in the depth, or offset -- not the diameter. Somewhere I remember seeing a photo of two XJ hubs sitting on a table or a board, flange side down, and the difference in overall height was about a quarter of an inch or more.. I've never heard of a difference in diameter.
What's the outside diameter of your hubs?
No my rotor will not fit over their hub. The hub is catching on the flange, on the 3 mounting bolt holes. Not sure I can measure the diameter of this though.