From The Fontsite:
Goudy Sans is the quirkiest of the Humanist sans serifs, although its relationship to other designs in this category is quite apparent: oldstyle proportions, oblique stress, and subtle variations of stroke weight. The roman form is somewhat less geometric than Gill Sans and Syntax, and the italic is significantly more embellished, almost to the point of approaching a script face. Particularly note the uppercase A and Q, which are beautiful in the italic. You'll also notice that Goudy Sans has very slight hints of serifs on most of its stems. Like the other Humanists, Goudy Sans italics are true italics, and not simply obliqued versions of the roman letters.