We won’t say bodyline should be the first thing you consider while buying a new car but the bodyline does tell much about the car you are planning to buy.
The engine is the soul of the car and if the engine is weak itself, there is no point of buying that car. For an initial check, you can just start the engine and listen to it carefully.
We are not saying that the older car will definitely have a bad suspension, but if the driver of the newer car has not abused the suspension, it is more probable to have a better one.
In the discussion of used car age or kilometres, the owner of who has a less driven old vehicle is less likely to get all the fluids changed regularly especially in case of budget cars.