Sony faceplate is 12 mm deep, while standard faceplates are 5 mm deep, so that would account for the difference.
Here’s a summary of the evidence.
The shape of the metal enclosure in the PC World photo indicates a Samsung drive. [Sony’s own photos are doctored to make the enclosure look completely flat.]
A curious mix of P-CAV 8x DVD±R and Z-CLV DVD±R DL strategies, typical of MTK chipset firmwares. This indicates a Lite-On and a Samsung drive.
The locations of the LED and the eject hole are consistent with a Samsung or an LG drive, and completely different from Lite-On, Optiarc or BenQ designs.
This, in combination with 18x max speed, leaves SH-S182D as the only drive matching all three clues.