The two Finau brothers are from Salt Lake City, where I live, and I have practiced alongisde them at the local golf practice facility. They are both amazingly long hitters. They don't usually "jump off the ground" and they are both capable of swinging extremely smoothly. However, at their young age, they obviously try to power their shots when "showing-off". Tony has an extremely good short game and he is apparently a great putter. He once scored 59.
I am interested to see what happens to them golf-professionally, considering that they apparently have no professional golf coach. Their uncle was their coach when they were practising alongside me, and the only advice I heard him give that day was "to keep the lower body quiet". I hope that their decision to become professional at such a young age doesn't hurt their future chances.
Jeff.