The 4-103326-0-17: This is a standard-density signal header, not a power interconnect.
Right-Angle Orientation and Board Layout Fit
The push-pull fastening is friction-only, so vibration resistance depends on the mating half's latch or on external strain relief.
Gold Mating Finish and Contact Reliability
In a board-to-board or cable application where the connector is disconnected quarterly, that is decades of service at the contact interface. The tin-lead post finish is fine for solder joints but does not tolerate repeated rework.