Businesses are trying to capture the added value of a Del Mar reference. I often see "La Jolla" businesses that are located in Clairemont and University City, same issue.
Carmel Valley and Del Mar are 2 separate communities in close proximity with each other. They both have beautiful homes and great neighborhood amenities. While Del Mar has some ocean front property, Carmel Valley is east of I-5.
If you choose a home in lovely Carmel Valley, you can always say you live near Del Mar :-)
I hope that helps.
@Jessica Nguyen, exactly! How unfortunate! :( Del Mar sounds so wealthy and like a tropical resort! I was looking into buying in the Carmel Valley area and If I did I only wish I would have been able to say I live in Del Mar. lol
In general though, if you think of Carmel Valley east and Del Mar west, you should be just fine.