There is no universally valid recommendation, since the decision depends primarily on size and feel and is a matter of taste. In the model comparison it is to be considered that the Traveller does not exist in Platinum version; if Platinum is desired, only the 145 Chopin remains. Practically relevant is additionally that the Chopin can be filled with a converter; the Traveller, on the other hand, presumably not. Anyone open to both sizes should be led by the immediate impression in the hand.