Rent
Neck and neck
San Diego and Chula Vista are about even on rent.
San Diego
$2,150/mo
Chula Vista
$2,150/mo
What this means for your life
Typical rent in San Diego is $2,150 a month versus $2,150 in Chula Vista, close enough that housing cost should not decide the move by itself. Factor it into your budget alongside salary differences between the two markets, then pick the city that wins the categories you actually live in: safety, schools, pay, or weather.