Stairmand, who had to settle for scoring 12.83 to Christie's 14.57, is the lighter of the two and admitted to struggling with the strong offshore winds.
Jay Quinn (Gisborne), was in equally devastating form to win his heat despite a slow start.
"It was a good result in the end but it was hard with the incoming tide and the wind," Quinn said.
A resurgent Bobby Hansen (Gisborne) is out to give the top seeds a run for their money and his was the best in a raft of top performances from the event's underdogs.
Raglan's Leon Santorik surfed well to win his heat as did Mt Maunganui-based Matt Hewitt, Tim O'Connor and Keone Campbell who all won their heats.
Conditions for day four today are expected to be good despite a forecast drop in the size of the swell.
Light variable winds are forecast for the opening of the women's and age group divisions and the continuation of the open and under-18 men's divisions.