I would go for the gamer.
Originally Posted by Phaedrus2129
Speaking of, NeoECO and HCG are almost the same power supplies. Both of them are built on SeaSonic's S12II and S12II v2 platforms. The major difference is that HCG has better capacitors and a nicer finish.
The NeoECO 520C and 620C were built on an early version of the S12II v2 platform (a platform unrelated to the original S12II but sold under the same name in 520W and 620W versions--it's a step up in performance). The platform was later finalized and released to retail with higher efficiency and tighter voltage regulation. Antec/SeaSonic may have switched NeoECO over to the final version and just not told anyone; but until someone does a side-by-side comparison that's just speculation.
The HCG 520/620 are based on the retail version of S12II v2, with better capacitors, fan, and finish.
What are you going to be powering? Could you please fill in your system spec via the User CP link above.