Pendulum path: What makes sense 67km highway or 54km highway

Hello, I commendel unfortunately tgl. a relatively long distance so far always highway. I now have a Hyundai i40 1.7crdi and consider considering the mileage savings and value preservation to use the shorter highway route. I have for my commuting route 2 options: 1. highway 67km, relatively rare traffic jam, A highway cross. 2. highway, where I drive about 7km through villages. On the whole “road” there are 2 traffic lights and a crossing more than on the AB-Stre otherwise I get through well and am almost only on bypass roads or last piece of federal road. Through the villages I get stable with 50kmh (no traffic) or partly 70kmh, where it is allowed. approx. 3km are quite curvy. The highway costs me about 5-10min more time Since I am on the highway relatively fast (approx. 150-170kmh) the fuel saving on the highway is approx. 0.5l-1l. Would you rather recommend a highway? Thank you for your answers!