Hmmm, probably don't know enough that I should be commenting, but tasted recently the 2001 and 2010 Weingut Knoll Smaragd Loibenberg GV side by side, and I would have to say I preferred the younger wine (even if it was not ready). The 2001, while developing some different character from the younger, more bracing GV, did not necessarily strike me as more complex. Personally, I like my white wines at intermediate age (admittedly a 2010 is too young), so nowadays closer to 9-10 years. The 2001 struck me as having lost a bit of energy (perfectly stored, so we cannot blame that), but each to his or her own taste.
I find the same to be true with Riesling--a fairly recent 2001 Riesling tasting, for example, including some of the Donnhoff Big Boys that did not impress as much as recent 2007 Rieslings (e.g, the 2007 Keller Absterde GG was mind-bogglingly good). I would take the recent (in the cornfields of Illinois) bottle of 2007 Weingut Knoll Smaragd Loibenberg Riesling over the 2001s as well. Maybe these 2001 bottles were or are in an awkward place, but...