No, the API Leaf Zone (assume this is the product) is not as good. It is just iron and potassium, so the other 15 nutrients are absent. All of these can occur from fish foods and water changes, but usually not in sufficient amounts depending upon the plant species and numbers. So a comprehensive (complete, in proportion) supplement is safest and better.
Flourish Comprehensive Supplement for the Planted Aquarium does not have levels of copper, etc high enough to harm invertebrates provided it is not over dosed; that can kill plants, fish and bacteria.