They won the test by a comfortable 8.35pts, and in the Open final Kirkpatrick beat Smith by half a point, with just 0.05pts to third placegetter and 2014 and 2015 winner Gareth Daniel, of Wales.
It was Kirkpatrick's third individual win of the tour, and with Smith having had two wins the New Zealand team members claimed all but one of the show championships they contested on tour.
Immediately after the weekend show Smith headed off on the 300km trip to Launceston in Cornwall, where brother Matthew will on Tuesday attempt to break the world nine-hour strong wool ewe-shearing record of 721 set by fellow Hawke's Bay shearer Rodney Sutton in 2007.
Results:
CP Wool International (20 lambs): New Zealand 95.1pts (Rowland Smith 12min 34sec, 47pts; John Kirkpatrick 12min 22sec, 47.6pts,) beat Wales 103.45pts (Gwion Lloyd Evans 12min 7sec, 51.7pts; Ian Jones 13min 25sec, 51.75pts) by 8.35pts. Wales won the series 2-1.
Corwen Shears Open final (20 lambs): John Kirkpatrick (New Zealand) 12min, 46.55pts, 1; Rowland Smith (New Zealand) 12min 9sec, 47.05pts, 2; Gareth Daniel (Wales) 12min 2sec, 47.1pts, 3; Gwion Lloyd Evans (Wales) 11min 54sec, 48.9pts, 4; Ian Jones (Wales) 12min 36sec, 50pts, 5; Matthew Evans (Wales) 11min 55sec, 51pts, 6.