can y'all help me pick please? Crescent vs. Fanny

I cannot figure out which one I would prefer.
I have a mini crescent in sour (adorable) but I want to be able to tote a book or kobo around.
I am leaning towards the fanny pack because I walk a LOT (5-10k daily) and it seems the comfiest.

People just LOVE the medium crescent, though! and it seems like it would fit more sizes of book? I am even open to the large since I wouldn't stuff it and it would have that cool slouch. Please tell me what y'all think & thank you so much.

💖 also, would love opinions about colors!
for fanny, there is a used peanuts one near me. new maybe deep sea or fig?
for crescent I am simply overwhelmed by options.