The 0.100" pitch sets the board footprint — each pin lands on a 0.100" grid, and the right-angle orientation means the solder tails extend 0.110" (2.79mm) below the board. The 4-wall shroud prevents mis-mating and protects the pins if the receptacle is inserted at an angle.
The 6-102203-2's 15 µinch gold gives it a higher mating-cycle ceiling than the tin-plated sibling, which matters if the connector sees frequent disconnect/reconnect in the field.
