If you sell large amount of gold they will be bought in chunks, and then if all of it doesn't sell by the end of the auction, you will get given whatever is left. So no, there is absolutely no difference.
I.e: lets say you put up 100 mil. One guy buys 5 mil, another buys 20, and then nobody else buys for rest of your auction. You get paid for the 25 mil and given back the 75 at end of auction.