The acrylic details I added differ slightly from Memoria's as well. Memoria has a silver sheen that enhances the action of the dark meeting the light paint. This painting used acrylics to round out and brighten the 'bubbles' that are in the left-hand top corner, mimic the pink streaks on the right-hand side, and add depth to the dark paint at the bottom left. The acrylics wrap around to the sides, as does the oil paint. They're very hard to capture on camera, but in physical view, they catch the light and draw the eye to the correct places.
I'm quite happy with this one, so I'm thinking about painting an even larger piece in a similar style.