Louis Vuitton Speedy B 30 or Siena MM? Help!

I can't decide which bag to purchase! I love the structure of the Siena, but prefer the Speedy Bandouliere 30 strap because I like a shorter strap. Does anyone have experience with both? Here are both on me-for reference, I am 5'7! Thanks!!
Are you more of a structured bag kind of girl? Then get the Sienna. If your more on unstructured / casual then go for the speedy. Had the same deliemma when I purchased my Speedy decided my lifestyle is more casual so I went with that over the Sienna.