Lg makes very good monitors and do make thier own panels so it would be a good choice to go with an Lg.
The AOC monitor may get their panel from a supplier and you would have to know which one, if they make thier own then they may not be as good as an Lg.
If you are limited on budget get IPS monitor from LG.
If you have more, get monitors from DELL.
DELL uses basically LG panels but with better quality control and better built quality.
U2312 for example.