Golfgal, I’ll take a swing at your question. The last two listings you mention are in La Costa Greens which is new and nice but in the San Marcos School District.
Huge difference in pricing.

The first two houses in Encinitas are quite a bit older construction although the one seems to have been updated nicely.

A huge appeal of SFT missing in all of your listings is the ability to walk to all three top rated schools.
In fact you can walk to OPE from Camino Alegre without even crossing a busy street.