Yes it's the same thing star..
I have SD's and a bristlenose pleco, I would definately say that the SD's will get the discs you are feeding no matter what time. I would go with the zucchini if you want to be sure he gets something.
I have spirulina discs I find if I break them into quarters and drop in say 12 quarters (3 discs) my pleco usually gets some and so does my raphael catfish while the SD's have a nice chunk in their mouths which keeps them occupied for about 40 seconds.