I have no experience with either of these foods, but just read the labels. If it has a specific named protien sourse as the first ingredient (I'm assuming it's "salmon meal")then another one or the same somewhere again in the next 5 ingredients - no corn or gluten - no by-products - is AFFCO approved to be "complete and balanced" then that would be a good food. Whether or not it's better or not as good as what you were feeding I couldn't tell you without seeing the ingredient list and the guaranteed analysis list of each.
If it's "salmon meal and sweet potato" I'm willing to bet it's great
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