I went through the same debate when I purchased my Ramona in September. The Ramona is the largest bag I own, and I didn't think that I would love it or get as much use out of it (I'm 5'3"). However, I took a look at both bags, side by side, and tried putting some things in there, and surprisingly, the Ramona worked better for me. The Riki looks deceptively large, but not as big as you would think. I use my Ramona as a work bag, so I need space for an umbrella, agenda, book, cell phone, blackberry, keys, and occassionally shoes or lunch.