I have both....but I am so horrible at describing flavors! lol
That being said, I really like them both. The Tahity is vanilla and almond. I have ordered big bottles of the Classic and not the Tahity though for the simple reason that you can add the Classic to other flavors better (to me anyway).
Neither one of them are overly sweet to me. They are just right. Just FSUSA.
Hope this helps at least a little.
Chris