The two health lists have one striking overlap. Autoimmune haemolytic anaemia appears on the Cocker's list, in which the immune system destroys the dog's own red blood cells; the Akita's list is headed by autoimmune disorders affecting skin, eyes and blood. Both breeds carry a real tendency toward immune-mediated disease, and in both it can present suddenly in a previously well dog.
Sudden lethargy, pale gums or unexplained collapse in either breed is an emergency, not a wait-and-see.
Beyond that they diverge. The Cocker adds cataracts, progressive retinal atrophy and hip dysplasia. The Akita adds hypothyroidism, progressive retinal atrophy, hip dysplasia and bloat as a deep-chested large breed.
On money the Cocker is cheaper to run at $80–$150 a month against $110–$240, and $1,100–$2,300 against $1,700–$3,200 in the first year — mostly a weight difference.
The honest adjustment is grooming and ears. A professional groom every six to eight weeks plus recurring ear treatment closes a good part of that gap in practice, and chronic ear surgery would close all of it at once.