Which is better - Ghent or Antwerp?

You can choose only one

100% Antwerp. Ghent is boring. Small, relatively twee. Though not as twee as the awful chocolate box Bruges - which is basically like being in a Belgian Cotswolds village with an extra smattering of lace. 

Antwerp has a modern city with loads of art and Uber-modern stuff, but also the old-style city squares in the middle packed with bars and restaurants. Antwerp is cool. Ghent is not.