I think that is a pretty fair comparison. The Waratahs are definitely Australia's Blues. Or should that be the Blues are New Zealand's Waratahs?
Not this year. The Blues in their heyday always liked to kick for field position mixed up with great running. Sort of like the Brumbies at their peak, before the poison of jakeball. The Blues at their best with King Carlos and the Brumbies with Gregan, Larkham and Roth seemed to be very similar in style.
Today's Force and the Highlanders have some similarities. Traditionally the Highlanders style was to try to dominate in the tight five with a very dominant scrum and lineout. It was born out of playing on mudheaps in temperatures below zero. Now the Highlanders have their closed-roof stadium, that style has evolved and does look more similar to the Force this year.
The Waratahs this year are pure Randwick in style. They play a game that has its origins in the 1920's and before, but probably epitomised best with the great Cyril Towers, who spent his life teaching and promoting it after he retired from playing. Very few teams try to play it because its so hard to learn to play well, but once you "get" it, it is very hard to defend.