When my Noodle was DXed she was very sick and her ketone levels were quite high. All of her bloodwork was pretty terrible at the time (liver, electrolytes, etc), the only thing keeping it from being true DKA if I'm remembering properly is that her blood PH was not quite acidic. The vets still referred to it as DKA half the time and treated her as such. The way I interpreted it was that the ketones had not been present long enough to become acidic, though they had to treat very aggressively to save her and stop that progression (maybe... it's all a blur still). It seemed that since she had quite high levels of ketones the treatment was essentially the same as DKA, but maybe her prognosis would have been better at the time had she not been facing FHL? I don't know that for sure, though. We were all just so glad she pulled through that I never asked for more clarification. I have it in my signature that way because her release paperwork days Diabetic Ketosis rather than DKA.
She has a checkup Monday with her regular vet who's studied all her bloodwork, I'll see if she has any insight re: ketosis vs ketoacidosis.