The nice feature about the Kobiconn connector is that it needs no wires to be soldered to, then soldered to the PC board. As the Kobiconn connector is a PC mountable. This way it is very easy to remove the face plate & pull the PC brd out as one piece. The other connector, PLEASE CORRECT ME IF I AM WRONG, you have to pull the face plate with the PC board & might cause to have cut wires during the repair or for what ever reason. Also when you connect the headphones to the amp the connector stands out like a soar thumb beyond the size of the amp.
The Kobiconn is very close to the face plate & does not add any more length to the amp. All these possibilities I have been though them when I was looking for a good connector for the Protector. The one that stood out of the crowd from all the other connectors with perfect fit, solid construction, price & the pc brd foot print.
All these features do make the Kobiconn connector, to my long search, the best I could do & find.