After claiming his second title in 2006, becomming the youngest ever world champion and double world champion (up to then), Alonso was regarded the biggest star in formula 1 in 2007, especially since Schumacher had retired and there was no other world champions left on the grid. But then Alonso failed to beat his rookie team mate, they were practically identical in overall performance and scored 109 points each. Does that mean everyone had been wrong about Alonso? Or does it mean his team mate was also a world class driver? I think the answer to that question is obvious.
Now, Vettel has surpassed Alonso and won twice as many titles, but it seems his relatively inexperienced team mate is on the same level. How can we know that this is not a new example like Alonso and Hamilton in 2007? Who can with confidence say that Ricciardo would have been beaten soundly by Alonso or Hamilton if they were team mates? I guess discussions like this will always appear, but I think history has shown us how difficult it is to rate and compare drivers accross teams. Before Raikkonen came to Ferrari, many people had the impression that Massa was chosen as a number 2 driver who would not be able to challenge the number 1. But then Raikkonen came and was indeed challenged by Massa. A few years later, Button came to McLaren and people said he was stupid because Hamilton would destroy him. But althoug some claim that is what happened, Button ended up scoring more points than Hamilton over 3 full seasons, and even if you can say Hamilton had more bad luck, it turned out that the difference wasn't that great after all. When luck is the decisive factor over 3 seasons and 58 races, the difference can't have been massive. Of course, Hamilton was faster, even in 2011, but overall, he wasn't much better.
Then we have some examples of the opposite. In 2005 Fisichella arrived at Renault and Montoya moved to McLaren and people talked about how exciting these two team battles would be, expecting a close battle. Nobody predicted that Montoya would generally struggle to perform on Raikkonen's level (with a few exceptions), while Fisichella would practically be helpless alongside Alonso. I remember a message to Fisichella over the team radio once, when he was told something like: "You are currently two seconds slower than Alonso. We know you have some under-steer, but you cannot be two seconds slower. Come on!" Alonso won the championship. Fisichella, despite a flying start with a victory under
lucky conditions in the first race, was 5th in the championship, scoring only 58 points compared to Alonsos 133.
This proves, in my opinion, that it is not all about the car. Fisichella had the best car in 2005, but he didn't win and wasn't even close. Schumacher out-scored both Fisichella and Montoya in 2005 despite inferior machinery. Webber had the best car last year, but didn't win a single race, despite his team mate setting a new record with 9 victories in a row, equaling Schumacher's record of 13 victories during one season. Webber even failed to take 2nd place in most of these races. The most extreme example I can t hink of, however, is the 1994 season, when Schumacher was quickest in every single race where he didn't have car problems or penalties set him back. Meanwhile, his team mates were generally unable to score points and only managed to do so on 4 occasions from 18 race starts. Let me add that it is always in the team's interest that both their drivers can challenge the opponents from other teams, but in Benetton in 1994, Schumacher got no help and Hill scored an easy 20 points in those races where a different driver sat in Schumacher's car.