Imo the heatsinks are different I can't say they are lower quality and I may be wrong but I doubt they are higher quality.
If ya have the $$$ go with
hlg if your looking for a competitive budget option this is a good one.
Again just my opinion but I have not run any SF lights. I'm in the market so maybe I'll pick on up and do a side by side vs my
hlg. I don't think there will be much difference in terms of growth bit Indo feel possibly in life of the product.
@SpiderFarmerLED what's a 600w run cost wise?