I find the justification presented for only Vettel having the technology a little strange.
It's common to test new systems on one car before rolling them out across the team. If the technology works and is reliable, Webber will have it before the end of the season.
Makes perfect sense to me. Webber and RedBull are not on good terms therefore RedBull doesn't give him Traction Control esp since there's a good possibility that he might blow the whistle on the whole operation if he finds out. In a lot of F1 circles there are conspiracy theories that RedBull is actively sabotaging Webber and there might be some truth to that as Webber is constantly at the receiving end of reliability problems, mechanical failures and botched pitstops whereas Vettel's car runs smooth without a glitch. I very much doubt that those two guys have the same machinery underneath them.
>> "It's common to test new systems on one car before rolling them out across the team."
Every weekend Red Bull claims the two cars are the same and Vettel is not given any advantage. Usually they test on one car in the practice sessions to gauge the advantage it gives over the current car but in quali/race the cars are usually (if we are to believe Red Bull) identical. I find the justification in the article regarding money unlikely though.
It could very well be that just in this race the technology was not working on Webbers car (as would be no surprise with new techology). Just wondering because of: https://news.ycombinator.com/item?id=6532428
It's common to test new systems on one car before rolling them out across the team. If the technology works and is reliable, Webber will have it before the end of the season.