I'm planning a trip (end of April) between Krakow and Brno, and am passing through both Ostrava and Olomouc, and have allotted ~12 hrs to do so. My question is this: Roughly how much time should I devote to Ostrava as opposed to Olomouc? 50-50? 34-66? 25-75? Obviously the time is insufficient for proper visits, so what are the "must-see" places in both? Thanks in advance!