Could they be any more different? Canas was one of the most consistent players from the baseline and Gulbis is one of the most inconsistent. Maybe Willy can teach Gulbis to play percentage tennis occasionally.
Federer, Nadal and Djokovic pander to plutocrats and charge huge appearance fees. The "trickle down effect" means that tournaments like the Heineken Open now have to pay appearance money for racketeers that many of us have never heard of. It's close to extortion.
At the end of Federer's first round match at the Australian Open a fawning interviewer asked about his kids and if he had bought coach Stefan Edberg a birthday present - no, by the way, the privilege of knocking up with 'King Roger' was enough of a present apparently.