Which psu is better?

Solution
without a better knowledge of the rest of your system you ask to choose between the following;

Seasonic M12II EVO Edition M12II-620 Bronze - 620 Watt 80 PLUS® Bronze Certified
and
Seasonic M12II Series M12II-520 Bronze - 520 Watt 80 PLUS® Bronze Certified

both good quality, one is just more Wattage than the other.
without a better knowledge of the rest of your system you ask to choose between the following;

Seasonic M12II EVO Edition M12II-620 Bronze - 620 Watt 80 PLUS® Bronze Certified
and
Seasonic M12II Series M12II-520 Bronze - 520 Watt 80 PLUS® Bronze Certified

both good quality, one is just more Wattage than the other.
 
Solution

So this is more powerful right? https://www.arvutitark.ee/est/tootekataloog/Arvutikomponendid-Toiteplokid-PSU-PSU-600W-650W/Seasonic-M12II-EVO-Edition-M12II-620-Bronze-620-Watt-80-PLUS-Bronze-Certified-SS-620GM2-87998