I'm afraid that the wines of Feudo di Marano are not known to me. Following though is my not-at-all encouraging tasting note for the Simi wine.
Simi, Chardonnay, Sonoma, 2006: Not much here and certainly not typical of Chardonnay. Light- to medium-bodied, light damp straw in color with stewed apple, pear and grapey notes. Lacks acidity and balance. Drinkable but not at all interesting. Drink up. Score 78. (Tasted 11 Feb 2008)