Rose, who was born in South Africa and raised there until the age of five, earned his second career win. He claimed his first professional title three weeks ago at the Dunhill Championship, a tournament co-sanctioned by the Sunshine and European Tours.
'A win is a win, no matter what tour it's on. This is one of the top five tours in the world, and this was also a different kind of win for me,' said Rose. 'At the Dunhill, I was chasing all the time and kind of nicked it at the end. But here I led for most of the final round and had to be careful not to get too calm out there.'
The 21-year-old began his round in a five-way tie for the lead with Moore, James Kingston, Richard Sterne and Scott Drummond. The battle for first remained tight until the sixth hole.
'I had a solid start of five straight pars. I did leave myself a couple of tricky four-footers, but the turning point came at the par-3 sixth. That was a big hole to me,' said Rose.
On that hole Rose made the first of three consecutive birdies while Moore and Sterne made bogey and double-bogey, respectively.
Sterne, Drummond and Kingston all played rounds over-par. Moore was the only other overnight leader to score in the red finishing with a 1-under 69.
'I think the course showed its real teeth out there today. It was a lot more difficult with the win.' said Rose.
Moore came back from a double-bogey at the par-5 third and the bogey at the sixth to pose the greatest threat to Rose. He came within one shot with a birdie on No. 16, but made bogey on the following hole while Rose hit out of a greenside bunker to save par.
'The other key today was that bunker shot on the 17th. I thought I had a two-shot lead when in fact it was one, so I was very happy to save par.'
Rose is currently second on the Sunshine Tour Order of Merit (money list), behind Tim Clark and ahead of U.S. Open champion Retief Goosen. With only the Tour Championship at the Leopard Creek Country Club remaining on the schedule, the Order of Merit title will come down to the wire.
'It's great really, I'm looking forward to that. I'm enjoying all my best results in South Africa,' said Rose.
Andre Cruse fired a 7-under 63 to finish alone in third at 13-under 267. He was followed by South Africans Clark (68), Sterne (71) and Grant Muller (67).
Full-field scores from the Nashua Masters