Red Bull team principal Christian Horner said Sebastian Vettel is more rational that Max Verstappen when comparing both Formula One champions. “They are very different people. They are both determined, they have that in common, but Sebastian is more rational. Max is just very, very natural in what he does,” he told dpa. Vettel and Horner worked together at Red Bull, where the driver won all his four F1 titles between 2010 and 2013. In the past two years, the team principal had Verstappen as his world champion at Red Bull. Horner praised Vettel’s “strong morale” and determination, and said the …