I have been using LEDs since about 2015 and LEDs will outperform HPS watt for watt there is no denying this at this stage in my opinion. The LED companies, however, do themselves no favours with their bullshit. Personally I would run as many watts as I could no matter if its LED or HPS whatever the space can handle.
The only reason I got into LEDs was because I was coming back from OS and had to start from scratch. If I was pulling 2 pounds of top shelf bud from a 600 HPS then I would just keep doing what I was doing. I dont pull 2 pounds of top shelf from 600 of LED so I would be interested to know what cut that is