I hate it when companies do this. Ford and Nissan have both done this to me.
It is not so much that I want to rotate five tires (I don't), but it would
be really nice to have a true spare that I could leave installed on the car
if one of the original 4 on the ground tires is damaged beyond salvage. The
last time this happened, I had to pay to have the spare tire switched from
the "steel" spare tire rim to the alloy "ground" tire rim. At least in that
case, the spare tire was actually the same type. I have had vehicles where
the spare, although of the same size, was actually a different "type" of
tire.

Ed