It all depends on the purpose of the connector, the amount of amps and isolation (volts) it should be able to handle.
For the best connectors I always look at examples in the industrial world and space / military applications.
There you can find connectors that are way too expensive or even unusable for hobby since it requires special equipment to crimp and mount/dismount the connectors.
The connectors you give as an example are made for as cheap as possible with reasonable quality.
A cheaper simple boxheader connector would also suffice for those purposes.