Warning! Be aware of input filter caps, which are rated only for 16V! (at least on v1.5), so 15V is absolutely maximum for PoE powering of this router
Main difference is that this router has 34063 UM-G1 445TA8 DC voltage regulator whose specifications show 40V DC as maximum allowed voltage, but recommended maximum voltage is 36V. So you can power this router with wide range of voltage: 5-36V DC.