I had two Siennas but I sold them because they were just too heavy for me. This is something to keep in mind. The Ginger is large and holds a ton and isn't as heavy. Both bags come with different types of leather, depending on the color and the season that it came out. Kooba leather varies greatly from model to model, year to year. I've had complete strangers comment on my black Ginger, and I've had two people tell me it is the prettiest handbag they've ever seen, which is quite a compliment! I do not like the Chestnut Ginger because the leather is just not that striking like it is in black or Terraine. I do not recommend the recent Siennas that are embossed or super bumpy (fall 06) because the leather is too stiff and not as pretty. If you're choosing between the Sienna and the Ginger, I would recommend the Ginger since the Sienna style may get dated a little faster because its been out a little longer. Good luck and enjoy whichever one you decide on!
Christi