As announced by AMD, the Radeon RX 7800 XT will have a reference version design that will be available directly from AMD's own webstore, while the upcoming Radeon RX 7700 XT will only be available as a custom design from various AMD AIB partners. So far, only Sapphire has listed the Radeon RX 7800 XT MBA version, as spotted by Videocardz.com. Sapphire is apparently sticking fully to the AMD design.
In addition to the Radeon RX 7800 XT MBA, Sapphire will also have a full lineup of Radeon RX 7800 XT/7700 XT graphics cards, including Nitro+, Pulse, and all-white Pure design. The full details will probably be available as of tomorrow, September 6, when AMD's new Radeon RX 7800 XT and Radeon RX 7700 XT are to be available.
Sapphire's Nitro+ series will feature a premium design, with a triple fan cooler, larger heatsink, and probably a hefty factory overclock, while the Pulse series will be a less expensive version sticking to a dual-fan design.