@rdalcroft I did some further digging and can conclude that Ultra DLSS isn't DLAA after all, which means that the DLSS Ultra Quality option in the menu could be considered to be correctly named.
While the input and output resolution stays the same, it isn't using the actual DLAA mode of DLSS, see screenshots below.
DLSS "Ultra Quality" (0.6668 render scale)/ rightmost DLSS setting in the menu:
DLAA (1.000 render scale), currently unavailable in the game:
While it's difficult to tell the two freeze frame/screenshots apart or to create identical A/B recordings of it, I perceive the latter as clearer when in motion, especially around the center part of the screen.
The addition of a proper DLAA preset with render scale 1.0 would be preferable.
