Connector design
Another point to notice about the connector on the right is that the shielding is broken so that the core conductor is effectively unshielded for the last few millimeters. The one on the left has the metal outer casing extending the shielding back past the solder joint. If three connectors like those on the right were connected close together, as in most jack panels, they would possibly interfere with each other as well as being susceptable to external EMI (Electro-Magnetic Interference). By the way, crimped connectors are better as no thermal stressing is introduced and a consistent joint is assured.
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