SH Dark Falz Gemini/Profound Darkness are out and as predicted, SH difficulty has more HP than XH difficulty.
SH Gemini Leg 1,166,595
XH Gemini Leg 1,012,502
Roughly 15% more HP on SH.
Due to the parts constantly spinning on PD and how the phase changes work, I can't properly check the HP on him other than on the 2nd last phase. It's a timed phase so it's difficult to lower the overkill damage on him but I will post what I got.
SH 2nd last phase 2,128,045 (29,538 last hit)
XH 2nd last phase 1,676,603 (96,872 last hit)
A 25~33% increase in HP on SH, % range due to large difference in overkill.