The Phanteks Eclipse P360X represents a well-thought-out evolution of the original P300. While it does essentially use the same metal frame as the original, Phanteks has done a good job of adding both functional as well as visual features to the chassis.
The shroud that is also part of the external shell, alongside the glass element with its black framing, is a nice touch. While some may frown upon the use of thumb screws in today's glass-focused market, it can easily be forgiven considering the price of the Eclipse P360X.
Externally, the P360X offers RGB elements inside the front cover, along with a nice line across the entire bottom edge of the glass element. You may now also not just control the solid colors as there are plenty of colorful animations to choose from thanks to the updated, built-in controller. On top of that, headers enable the expansion on one end and motherboard control on the other. However, with all this additional lighting, Phanteks has done away with the admittedly cool RGB power LED that used to change color along with the rest of the chassis.
In terms of internal functionality, the general frame has not seen too many changes. You still get a clean metal shroud and the offset cable trench with the openings facing the motherboard. You may now install up to two 140 mm fans in the ceiling and will have an easier time with liquid cooling of up to 240 mm because of the offset mounting holes. On top of that, Phanteks has upped the storage capabilities of the P360X by offering two SSD trays, bringing the total number of storage bays to four with the option of buying an additional SSD tray if you need it.
The thing that bugs me the most is the lack of a support bracket on the back, next to the expansion slots. Unlike most, the P360X doesn't offer seven separate openings, but one large cutout instead, which reduces overall structural integrity. So, it would have been nice if that extra piece would have been kept.
With all the extra external bling and internal updates the P360X is worth the US$10 extra MSRP over the P300 and a great choice for those who want a case that offers a tad bit more.