The RTDs do taste different from the powdered shakes - creamy and thick.
I like the Vaniller RTDs, they remind me of Canned Cow; I dislike the Dutch Choc - too chocolately.
This is so weird-o-lah as I can hardly stand the Vaniller powdered shakes unless they have cinnamon, cloves & nutmeg or diet root beer - to my tastebuds, the powdered 'nillas are too sweet!
BTW, Newbies: the RTDs are approved for people with Diabetes and for folks who are lactose intolerant.
I don't think they stick with me as long as the powdered shakes (and they go right through much faster, too!) - any one else have a comment about the staying power of RTDs?