We're starting our trip in Rome next spring where we will spend 4 days. Then we plan to take the train to Florence and then on to Venice. Originally our plan was 4 days Rome/2 days Florence/ 4 days Venice, but I'm wondering if we should switch it to instead spend 3 days in Florence and Venice each. Would the extra day benefit us in Florence? Would we miss anything in Venice if we took a day away there? Thanks!