You can't really get an accurate comparison with this little bit of information. One thing that has to be understood is that ingredients are listed by weight. Hikari is using a fish meal as the main ingredient. A meal is something that has had the water removed from it, which is required to make the pellet. Omega 1 is not using a meal ingredient and is instead opting for seafood which still contains the moisture. When the water is removed the weight can be lowered by as much as 70% which could place the seafood ingredients significantly further down the list.
well thats deffenatly an idea but first fish meal is made of the scraps of fish left over from the edible parts being used. meal is bones, fins, scales, organs, and fish. so that certainly doesnt sound like something that should be the main ingredient, but there next 2 ingredients are undigestible corn and flour. where as omega ones first and main 3 are whole salmon, halibut, whole shrimp so it makes sense that that combind weight surpasses the meal product of hakiri. but they dont tell the weight of each product so its pointless to assume.