I've not been to either but have been researching a lot on the DIS for my Nov. trip - when I'll have Tonga Toast for the first time!
According to what I've read on the DIS, there is no strawberry compote available at Captain Cooks CS. Some say the compote makes the Tonga Toast, others disagree & say it can do without.
Another person posted that the TT at Captain Cooks seemed pre-made, like it had been sitting awhile, and the crispy cinnamon sugar coating was mushy. I guess I can see how that could happen at a CS, they might make some ahead during the busy breakfast hours maybe?
Someone else reported that they love their TT grilled, not fried, and you cannot special order it that way at Captain Cooks, only at Kona.
I have a ressie at Kona & it's one of the highlights of my trip! (Sad but true).