Energy from nuclear fusion is around 400 times more than that of nuclear fission for same mass.
Nuclear fusion doesn't produce energy.
Nuclear fission
Nuclear binding energy is released mostly as heat energy.
Elements are created that differ from the reactants.
fission
Both release excess nuclear binding energy.
Nuclear fission
In nuclear fission, the reactant atoms are split into resultant atoms, and a release of energy.
Nuclear fission means that in this process the heavy nuclei are split into fragments (or fission products) when bombarded by neutrons and results in release of energy.
Definition: energy from nuclear fission or fusion: the energy released by nuclear fission or fusion
Nuclear fission of uranium-235 release fission energy.The fission energy is enormous compared to the energy obtained from fossil fuels.
Nuclear fission