Whether it is worth it or not depends on how much you care about PSU efficiency.
80 Plus means the PSU is at least 80% efficient. Bronze, silver, gold, and platinum certifications mean the PSU exceeds the basic 80 Plus requirement, corresponding to efficiency levels of 82%, 85%, 87%, and 89% respectively.
The years just pass like trains. I wave, but they don't slow down.
-- Steven Wilson