The manufacturer will be leaving behind the Aorus X design in favor of a newer narrow-bezel look with more heat pipes, more ventilation, and a slightly thicker profile. The change will hopefully address some of the most common drawbacks of the original Aorus chassis including noise and heat.
https://www.notebookcheck.net/Gigabyte-will-slowly-phase-out-the-Aorus-X-series-this-year.393381.0.html