I don't think there is any real difference, we are talking different things here. Sheikh has measured the spring translation ratio R as 0.6545 front and 0.8756 rear. These are almost the same values Svanniversary has used for his calculations (0.63 front an 0.88 rear). R² is needed to translate raw spring rates to effective spring rates at the wheel.
The difference between static hight and full bump in stock condition isn't really important (especially if the car is lowered, obviously). The essential thing to look for is the effective spring rate ratio front/rear and - consequently - the resulting ratio of natural frequencies front/rear (taking into account secondary spring rates caused by anti roll bars). As Svanniversary laid out in his initial post the theoretical optimum of the latter is somewhere between 0.91 and 0.95. E
However, these are all rough estimations. Everything that doesn't deviate grossly should be fine. Raw spring rates proven to work fine (on aftermarket coilovers) are values like 70/40, 60/40, 50/30.
Bump stops may also play a vital role here when cornering. As far as I know they have not been taken into account at all. However, some cars - especially running lowering springs on stock dampers - may actually be just millimeters from touching the bump stops at static height already. In this case the effective spring rate might change rather dramatically through high speed corners.
Damping will also have a slight influence on the natural frequency (higher damping has the tendency to lower the natural frequency), thus on the natural frequency ratio when set differently for front and rear. If you opt for adjustable dampers you have one further degree of freedom fighting the annoying highway bouncing.
I have personally owned the ST X and now own the Bilstein B16 (adjustable dampers). I found the ST X ride quality to be absolutely fine, but didn't fully understand the issue of imbalanced spring rates back then. As a result my wheel alignments never yielded the expected results, I've been hunting ghosts for many months.
I consider the B16 to be pretty much on par comfort wise. I don't attribute the all too obvious stick-slip effect seen with the OEM Bilstein dampers to them being monotube, but rather to general construction and build quality. The effective spring rate ratio is a tad on the oversteering side in theory but I can't really confirm this in practice.
People have tried the ST X with 60/40 springs here (although it cannot be done legally) and the results were below optimum. The front axle shows as being slightly underdamped and there is no way to compensate for this due to missing adjustability.
Go figure ...
Hint to German speaking readers:
Ich glaube, es ist für den Adressaten einfacher zu verstehen, wenn ich das direkt auf Englisch schreibe, als wenn er es erst durch deepl.com jagen muss. Falls es jemanden interessieren sollte, der des Englischen nicht mächtig ist: DeepL funktioniert in beiden Richtungen. Ist aber nichts Neues dabei gewesen.