The upcoming 17.3-inch system will be just 0.2 inches thicker and 0.8 pounds heavier than the new Aero 15 with a different set of display options. Most core configurable options will be the same between them.
https://www.notebookcheck.net/Gigabyte-Aero-17-is-finally-here-with-240-Hz-FHD-and-4K-UHD-HDR-options.422374.0.html
Contradiction anyone?: "Gigabyte Aero 17 is finally here" and "No word yet on when we can expect the Aero 17 to become available"