I know you're thinking about PAR being very important, but for me it is quality. The boards HLG has are better overall quality , and worth the extra money and is why I would go with the HLG kit. The mars will work great, and may even put out more light or something, but I would rather ensure a top quality fixture that will last me at least 10 years.
I was just talking in another thread how it would be interesting to do a side-by-side grow with spider farmer, mars hydro, and HLG lighting. Everything would be controlled in the experiments. We could then analyze the total cost of the light vs how much product was made and also do another lighting test after, to see how much efficiency has changed between each light over the course of one grow.
Led's keep changing, and getting better and cheaper, and more worth it to buy. The thing is it's so new, we don't know how long things will last so Instead of taking the gamble I paid a little extra to ensure I am getting top quality bin diodes, by a company I trust, and be able to focus on growing and move on from ever having to upgrade my lights