645/650 or 335 Coupé

Good evening, I wanted to know your opinion for a moment. As it looks like I will finance a nice used one about the company at the beginning of the next year. I’m just not sure if a few years older 6s or a younger 335 he. Preislich so ca.25.000 €. Tend more to the 6s but by many good test reports of the new 3s I’m thinking about. Can someone tell me if the automatic with the switch-buttons with both great differences or if the Is the 3rd sporty and a bit more economical but the 6th with V8 and its shape will always be something special. Has someone already been able to drive both vehicles? I will of course at the beginning of next year still both test drives but curious I am of course already, how so the experiences of you are Thanks already!