Theoretically not as good as GX550.
@OP: I'm not giving my personal opinion here. I'm only repeating the conclusion drawn from several reviews I've seen. So, I guess I'm sure about that I have posted.
no theory please.
I need practical user based feedback
please dont take it personally.
In case of reliability not only that 80plus and plus12v rail wattage.
You can also look for Seasonic S12II-520. Its 80+ Bronze certified and comes with 5yrs warranty. Will cost around 3.8k-4k.
here , no seasonic psu are available.
Psu available of these price ranges>>
1.thermaltake lite power 650w
2.thermaltake smart 550w
3. CM GX550W
4. Gigabyte superb 570w
5. Gigabyte superb 720w.