I am not sure that one skipper stands out over the other. Starts are probably close to equal, given that since it is not a windward start being marginally over the line first doesn't help, rather it is the first to the circle at mark one gains rounding rights and the leeward boat can have the advantage there. In the last few races that has gone to the boat with port entry.
Secondly covering the trailing boat is standard match racing. When close enough behind for it to count JS
has set up split tacks which put ETNZ in a position of having to do two tacks to cover, or at best an extra tack if left.
Where once ETNZ was tacking better OR did better in the last race or two so they may be less ready to get into a tacking duel. That means there is some risk of the opposition picking up a windshift as OR did.
Both are top level skippers, but it doesn't mean that neither will make a mistake which can be costly in a 20 minute race.
It is a spectacle surely and can be exciting, however the venue gives a short narrow circuit with a pretty constant wind reducing the wind variability and tactics and strategy.
There have been other exciting races, albeit slower.