So I am going to follow up with my thoughts. I am using optional 5 slot styled steel rims, and the factory assembly manual clearly shows a styled steel rim being used for the spare as an option with protective pad and different stacking order of the jack vs a standard steel rim. So I consider:
1. The spare rim is going to match the same as the 4 mounted rims (space saver option excluded). The assembly manual is suggestive of this being the practice.
2. If all 5 rims are the same all 5 tires are likely the same too.
If the spare was a standard rim vs styled I could believe an argument for the standard tire vs upgraded optional F70 RWL.