Despite the judges' decision, I think Yamaoka lost this one. Yamaoka drawing against Kaibara because he 'looked at curry as an expression of freedom' feels like such a cop-out, especially when Yamaoka's 'freedom' basically meant 'going back to Japanese curry'. Even Yamaoka recognises it.
But of course, if the judges only judged on skill and fidelity every time, there's no way Yamaoka could beat Kaibara. Kariya has written Kaibara to be too formidable.
...That said, I would still demolish Yamaoka's crab curry. It sounds delicious.
I mean, Kaibara himself said that it's all about how you process the spices in such a way that it brings out the flavour well
and fits best the other ingredient. Literally in this situation the problem is the base meat is also different, so it becomes apple vs oranges kind of thing.
The reason why they said the Supreme curry is better is that it's "more rich" and "has more depth". Fish and crab curries exist, and how you need to handle the spices for those would've been different than for meat like pork or beef or even chicken. Kaibara didn't bring a seafood curry to directly compare how he would've added that depth.
In the previous chapters they were often saying that seafood and fish tend to have a more subtle flavour, maybe seafood curries are just going to be inherently less rich than meat. Especially since they also keep harping on about making sure the ingredients' original flavour will still shine. Otherwise it'd also be a failure for overpowering the ingredients with the spices.
They also made this whole point of how even in India everyone does it differently, so basically the main idea was that "curry" is just home cooking with spices. That's why the angle of Japanese palate comes in. At the end of the day everyone in question are Japanese. If you go by the principle of "it's home cooking/everyday food", Yamaoka's idea of adapting it to a more Japanese style is not a cop out.