Thanks again SmokeSara for the info comparison.Mars II 1600 Draw power:110V Bloom: 704.7w±5%,Mars Pro II Epistar 320Draw power:110V Bloom:740W±5% ,and Mars Pro II Epistar with better built-up compare to Mars II.
It will depends on the size of how big your plant will be...
So the Epistar is a little better in wattage and light distribution = a better yield depends on other factors.
A Licenced Medicinal Cannabis User