Hey Glendog i like to use Windguru for the forecast. When i said 'less' wind i was more referring to the amount of days rather that the strength. I normally keep an eye on both Raro and Aitutaki over the Jun - Sept period and IMO Aitutaki looks to get more windy days.
Having said that if you look at both areas to do you would be getting more kiting done in Raro, its the luck of the weather gods i guess.