I have both, not sure how that came to be, but from memory i think they ran out of stock of the holey ones and we bought flat ones. we use the flat ones in the sleeping area of our CT and the holey ones out in the "living" area. If camping on grass i dont bother laying down the mess floor i just install the click together floor and done. If on sand, then the mess goes down the the click floor over the top. Never had dirt come up, not that ive noticed, the plus however to having the holey ones in the "working" areas if for spills and other accidents, much easier for clen ups.