The Thermaltake Divider 200 TG clearly looks like a case belonging to the series. Its numbering scheme also makes sense as it is lower than the Divider 300, which allows for a full ATX board as opposed to mATX in the Divider 200. But aside from looks, this case is otherwise fundamentally different.
The most obvious difference is the lack of an ARGB fan in front. While Thermaltake employs three ARGB fans in both the Divider 300 TG and Divider 500 TG, the 200 TG just comes with a plain black variant and thus no ARGB controller. That makes little sense since Thermaltake is one of the few brands that actually offers a 200 mm ARGB fan separately. In fact, it is the exact same unit as within the chassis, but with hub-mounted lighting, so there is no reason to omit it.
Beside that, the Divider 200 TG obviously departs from the classic mini-tower form factor, instead going for a stacked, horizontal layout resulting in the cubic shape of the case. This makes it rather unique and different, which in turn makes it more attractive if you would rather not go with the flow. It also allows you to really show off your hardware nicely because of the top glass panel, even if the whole setup will take up more space on your desk in terms of width.
While Thermaltake initially aimed for a $109 price tag, you should expect to see the Divider 200 TG go for $139.99 in the US due to tariffs, at the time of review. That makes the chassis just around $10 cheaper than what the Divider 300 TG ARGB currently retails for, which comes with three ARGB fans in the front, but lacks that "wow" factor the cube shape and 200 mm fan the Divider 200 TG provide.