I have the same problem with deciding whether to take the 30 or the 35. I think that it depends on yourself, and in my opinion the 30 looks much better on you. The 35 looks a bit like luggage, but maybe the picture makes it look that way. You really look more feminine with the 30. Go for it! But maybe keep the 35 as a shopping bag or for short city-trips (only if you really love it, but there's really no need to keep it). But in general, the 30 is better for you!
Have fun with your bag!
Have fun with your bag!