Hello! Can anyone tell me what the difference in length is between the shoulder straps of the Buon Viaggio versus the Mamma Mia? Is the drop of the straps of the Mamma Mia MUCH SHORTER than the BV? Is the Mamma Mia a really COMFORTABLE SHOULDER bag? Or should I stick with the BV? I already have SEVERAL Buon Viaggios, and it's the perfect shoulder bag for me, but I'd like to try a Mamma Mia, but only if it's a good shoulder bag. Can anyone who has BOTH tell me the differences? TIA!