The best thing to do if you cant decide is to purchase one. Once you see that your HPS grows better you can always sell the LED! I have WASTED over $3000+ in this hobby and wouldn't change anything because its valuable learning process.
Steviodaddio , lol you use your 24/0 and ill use my 18/6 and grow bigger plants per wattage.. Im just trying to give you some information so you can do the test yourself. I've already experienced it and know what works. Goood job on your research! I think you should do a little more if you dont think any of those things i listed matter.
Myself I dont believe anything until I try it I only take advice and get ideas on things to try next. Good luck mate. Your plants look good by the way!!