Looking very good. Throwing Ananda and HE 1000v2 graphs for reference should be very useful. Like I said earlier though, Sundara 2020, though may not be as technically proficient as these, still doesn't recess between 1k and 3k like other hifimans and most of the planars. In that way, Sundara is still pretty unique.
On another note in
@oratory1990 's graphs, neither Ananda nor HE 1000 v2 have this kind of roll-off in the sub-bass area.
Edit: First I thought it was not a standardized measurement rig. But in the site says "all measurements done using a IEC60318-4 compliant coupler with silicon ear and cheek"