Asus is cleverly using the Radeon RX 7800 XT custom design boards, considering that the RX 7900 GRE shares a lot of similarities, so the Asus RX 7900 GRE DUAL OC is a triple-slot, dual-fan version with 100mm Axial Tech. It lacks RGB lighting and works at 1927MHz Game clock, which is a decent factory-overclock from the reference 1880MHz. It also gets a Dual BIOS feature.
The Asus TUF Gaming RX 7900 GRE is a whole different beast as this one gets a triple-slot, triple-fan cooler with DirectCU III TUF Gaming cooling solution. It also gets a Dual BIOS feature, and slightly higher factory overclock of 1972MHz.
Both should be coming to the market soon but due to custom design, we expect them to launch closer to $600, rather than $550. Nevertheless, factory-overclocked Radeon RX 7900 GRE holds its ground even against the RTX 4070 Ti Super.