The M12II 520w is an older group regulated design, and normally we don't recommend that users buy power supplies built on this type of platform anymore, because there are much better designs out there these days. Unfortunately, in this case, it's still a better power supply than the EVGA BR series units, which are low end garbage. While the M12II lacks some protections found on a lot of newer platforms, at least it has all of the most important ones and has good build quality. IF these are the only two models available to you, then the M12II is easily the better option so long as you are not running an Intel 4th gen or newer platform, because group regulated power supplies are not "Haswell C-state compatible" unless you disable the C6 and C7 low power states in the BIOS to avoid problems.
There may be better options available to you even in your region, so don't be in too much of a hurry to pick one. Take your time, read the information at the following links and then make a decision once you are better informed.
Below you will find MY standard list of recommended power supplies and beyond that this thread is intended as a landing place for questions or discussions regarding specific units, platforms or related PSU tech, all of which are all welcome to be discussed here. If it's related to power supplies...
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RealHardTechX PSU capacity recommendations by graphics card model
This "tier list" might list some models not commonly found or addressed in my recommendations as well, so it might be useful when trying to find models in your region that are worth purchasing.
PSU Tier List 4.0 rev. 14.8 (outdated) Last Update: 12-07-2021 Legend : Gray - EoL/obsolete and/or otherwise not recommended for purchase. Green - small form-factor (gold and blue colors are disregarded due to scarcity of SFX PSUs) Gold - best units in the tier (includes requirements for blue...
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