that much of a difference. You could try a couple of small test candles and see how they perform. I think the same size wick will work just fine.
My candlemaking days are long past, though. I used to make candles at night on a beach near Morro Bay, CA. This particular beach was a gravel beach, with a wonderful mixture of gravels, all graduated by size according to where you were on the beach. I dug holes as molds for the candles, some with three feet made by sticking my finger into the sand, as needed. All the shapes were freeform, and some were quite complex.
When the candles cooled and were removed from their gravelly molds, they had an outer layer of colorful beach gravel. There were even jade pebbles on that beach. Very 1970s, to be sure, but the shapes were very interesting. Most had multiple wicks, depending on the design. I made a few bucks here and there with these, but the best part was sitting on the beach through the night, melting wax over a small campfire, and casting candles all around me in the beach.
A little of the kind herb was also a big plus...