The little Lycomings have a deep, short (fore and aft) oil pan. The Continentals have a shallow, but long (fore and aft) oil pan.
The 185 should have different markings on the dipstick for floats and wheels. The 206 does not, and it shouldn't vary ALL that much, though some.
With the Cub, it'll vary just a bit, more if you use very big tires on wheels, but really not enough to make much of a difference, at the range most fly these engines, which is around 6 to 7 quarts.
MTV