This Sparkfun BOB-00716 RJ45 breakout has advantages over the existing Sparkfun (v. 4, pth, rj45-8) RJ45 connector in the library.
The existing library connector has 2 rows of 4 pins on 2 edges of the PCB. The BOB-00716 has 1 row of 8 pins, so on one edge of the PCB.
The benefit is that more pins are available on the breadboard, and no pin locations are blocked/obstructed when inserting an RJ45 cable.