depends on your grow op.
Gavitas are good and SamsungLM301H will do the job too. both have advantages and disadvantages.
can't run 4 gavitas here so would opt for the led. a dream would be a mix of both.
edit: i was thinking classic gavita de fixtures amd not their led lights. my bad.
More or less the same performance.
Get whatever comes cheaper and with better support in case of malfunctions.
Personally if money was not an issue I would get Gavitas.
Samsung make LEDs, and Gavita assemble light units using LEDs.
I have no faith in Gavita as a brand, and no idea what they are using. However, I don't know who is making the 301 units either, or what they might be blended with.
I do know the 301 is technically a good LED, and Gavita is a label I have bad experience with. Making this a poorly weighed up, but easy decision