I am running 100k silicone in the rear and 50k in the front of my LST. This way if I am climbing my rear wheels are less likely to spin as easy. Where as in the front when you climb you would want the wheels to turn easier for grabbing.
If you reverse the situation and put heavier in the front and lighter in the rear, your front end will pull you through turns better. Well for all wheel drive anyway. They do that in the sedans.