I like the Tri-nations more, there are no easy games and Nz SA ans Australia are usually ranker 1 2 and 3 so its the best teams facing off, the weather is generally better so the rugby is a bit more attractive . But i like the six nations because its not as dominated by one team as the Tri- nations is, and i think there is more history behind the six nations. I like both watch both but over all i think the Tri-nations or rugby championship as its called now is better

Six nations

6 Nat, more teams, more games, more crowds (full stadiums)

I generally prefer the Rugby Championships (which is what the Tri Nations is now called since Argentina joined). The reason is because I feel the RC teams play more free flowing, attacking rugby. 6N games largely a succession of penalty goals, there are typically far more tries in RC rugby from my observations.

Do you mean Rugby Championships (four nations: Argentina, Aus, NZ &SA)? Both are good competitions, the weather here is generally better than in the north so the rugby is more attractive. As well, the rugby reankings tend to be NZ first and Australia and SA swapping between second and third with the NH sides following on.