Coops are actually better, property tax wise, because you’re buying shares in a corporation so there should not be a reassessment. Not sure if the HOA sends a separate bill for taxes or the $6XX includes taxes.
$6XX HOA is pretty good. Includes interior plumbing and electrical repairs, low internet cost, and replacement of appliances every 10 years (there’s upgrade fee for premium appliances). Shuttle buses to the mall and to John Wayne airport.