The answer is: A laredo has rocker cladding at the very bottom covering the rocker panels. It matches the cladding that is on the doors of a Laredo. A limited DOES NOT have cladding over the rocker panels, they only have the body color cladding on the doors. The premium running boards from Mopar has the rocker trim filler piece that fills the gap of where the running boards are and the body.
To install the mopar premium running boards on a Laredo, you have to remove the rocker panel cladding piece that runs along the rocker panel under the doors. That running board plastic filler takes it's place.
To install the mopar premium running boards on a Limited, you do not have to remove any cladding or rocker cover as Limited models are all body color and do not have a plastic cladding over the rockers.
So removing premium mopar running boards on a Laredo, you would need to put the plastic cladding for a Laredo back on the rockers. You would do nothing on a Limited.
Now.........you could just paint the rockers a matching gray like the door cladding and it would look fine.