Neither UCSB nor UCSD are “easier” schools. The UC‘s are public universities, funded by the State of California and made for State of California’s taxpaying residents, who get priority preference for admission. Cost is 65K a year. Expect to pay $65K a year. They do not fund international students. Expect to pay full fees at any California public school.
UCSD is near the coast, but the coastal fog doesn’t burn off until the afternoon. The school is not “beautiful” but stark concrete and glass. It’s known as “UC for the Socially Dead”. There are no large sports and school spirit. Did you do any research on the schools?