Which bra would you buy if you were me?

Hi I'm 13 and I'm think I'm a 34B . I want to get a bra that doesn't make my chest bigger. My choice is between a soft cup removable pad bra or a pull over sports bra that has removable pads. The sports bra doesn't look that bad because it looks just like a bralette but with the pads. Which bra, between these 2,would you get if you were me? Thanks!