XRAY - Model racing cars

Hi guys!
Is it fair to say that when you have a hard diff setting in the front (300 000 and up) you need to increase in the rear as well?
I've looked at setup sheets and I see all sorts (this figure often left blank too.....)
Also, for best steering on a bumpy and medium grip track, would you go for harder or smoother diff settings?
Happy racing to you all

I had the 2013 model with 300,000 in front differential and rear differential 80,000 for tracks with medium grip and traction , with little grip front diff 200,000 and 60,000 rear diff,I hope you help serve.

I edited the post to be more clear.

Thank you! It's perfectly clear.
I know it's also very dependent on driving style.
Happy racing to all

all depends on your riding style, of course, and the conditions of the circuit, but you can serve as a base, looking setups on this website, you will have more references.

best greeting.