San Diego and Oakland have a similar cost of living.
When comparing San Diego, CA and Oakland, CA, the overall cost of living indices are 197 and 195 respectively (national median = 100). Rent is $306/month cheaper in Oakland, saving renters about $3,672/year.
Median household income is $6,952/year higher in San Diego. Home values also differ significantly — the median in San Diego is $848,500 compared to $924,700 in Oakland.
Both cities share the same state tax structure since they are in California.
San Diego vs Oakland — common questions
Other cost of living comparisons for San Diego and Oakland