I'll roll in for a moment on this one...seems almost in my lane.
The original RIM-7 Sea Sparrow was truly a Point Defense only missile. That means it'd be capable of shooting down a missile (or aircraft) that's pointed at our ship.
The upgraded RIM-162 ESSM is a much more capable system that is more capable against all types of targets.
Does that make it an AREA air defense capable system? Nope. Not in the least. However, the Wikipedia (open source) info on ranges are as follows:
RIM-7 : 10 nm (19km)
RIM-162 : 27+ nm (50+ km)
Additionally, if we bought in, the RIM-162 has the ability to be put in a quad pack, instead of the single cell missiles, so instead of 16 cells holding 16 missiles, you could get 16 cells holding 64 missiles. BIG leap.
All that said, the ESSM is faster, longer ranged, and more capable than the Sea Sparrow, but it is not considered an area defense capability such as the SM-2 missiles provided.
(Note the SM-2's open source range is listed as 40-90 nm, (74-167 km) or 65-100 nm for the ER version)
NS
https://en.wikipedia.org/wiki/RIM-162_ESSM
https://en.wikipedia.org/wiki/RIM-7_Sea_Sparrow
https://en.wikipedia.org/wiki/RIM-66_Standard
https://en.wikipedia.org/wiki/RIM-67_Standard