The Brick and Espresso leathers definitely hold up better than the black and wheat. Still, regular cleaning and conditioning (there are arguments for and against this for "coated" leather like we have) will go a long way in keeping the leather looking at its best. I try to clean and condition every 2-4 months.
My preferred conditioner is from Zaino because it does not leave the seats slippery like the cheaper conditioners, does not need to be wiped off, and it smells incredible.