A question about difficulty and credits? (Goliath)

I will start be saying im not the best driver ever lol. But would i be better off if, for say, i do goliath at the highest difficulty and more than likely come in last because op drivatars or play at a difficulty where i win. Just wondering how to get the most credits for my time out of running goliath.

You could test it yourself.

Keep the car and perks the same and run on unbeatable and then something easier - 1 lap each, all other settings the same.

To give you an idea, the difference from Pro to Unbeatable is approx 5000cr per lap for a Goliath win in a Countach HE credit boost car.