The revision of the chassis is TJ10B-WES, adds support for ESA, a new technology by NVIDIA. The appearance of the chassis did not change. SilverStone just add a PCB to support ESA. With the PCB, ESA software can read data from chassis, and directly control it (ie. fans and water cooling systems).

TJ10B Gallery here.

The price of TJ10B-WES is about 369USD. Consider TJ10B is only 299USD at newegg, the price of TJ10B-WES is a little expansive.

By adding this PCB(some more wires and some screws of course),the chassis supports ESA.

But if you already own a TJ10B, SilverStone have another Option for you. They made a 5.25″ box containing the PCB for about 20 USD. So it means an old chassis also can enjoy ESA but have to sacrifice a 5.25″ bay.