I'm a spy virgin, and i recently tried on a large spy (retailed over $2k) at a sample sale (selling for $1400). it was way too big & cumbersome for me. i've never held a baby spy, so i'm wondering is there a significant difference between the baby spy and the regular spy that i see most women carry? how much can the baby hold? i know there's that difference between the zip top and the flap top, any other differences other than the opening? i have an order placed for a baby zucca spy which i saw on the celeb thread and thought it was too cute. thanks!