alright ill give u the 411, roberto sport is an italian type table, they have a smaller ball smaller men big net, the surface on the world roberto sport or champion edition if i remember correctly, is the only RS table u want to get not the ones b4 it, on this edition, it has 2 surfaces that can be swapped for both fast ball and slow ball, one surface slick the other rough,
the world RS is a beautiful table, u can pin, smaller men smaller ball, bicycle hand grip so u dont need to wrap your handles, and has ramps, including the ball tends to chip here and there, but not much of a big deal
now the Tornado table, is the american world table, its known everywhere around the world, its highly played everywhere that plays foosball
it has 3 goalies but mainly 1 goalie to save, the other 2 goalies were meant so u can take the ball out of the corners b/c there are no ramps, also since there are no ramps, everything more controled, the ball rolls true all the time,
the bars are more sturdy and weighted, while the rs bar is flimsy, if anything u will see more bent bars on a rs than a ts, but then again both bars once bent, pretty much are bent, the ts table is probably your best bet if you are in North America, or anywhere, The RS is good if you are in Europe b/c the table is similar
But for competitive play, depending where ur at, is probably what table u wanna learn on,
i hope that helps,