As the title says really, do we think it was a case of Mercedes and Lewis winning the championship or was it more of Sebastian and Ferrari losing the title?
For Hamilton and Mercedes, it's clear that this combination was the quickest in qualifying trim and this has enabled Lewis to lead from the front at half of the races this season. Also, they have had reliability on their side, finishing all the races and picking up the points when they couldn't win. Lewis still got points in Monaco, Russia and Hungary when the car or him weren't quite on form.
For Vettel and Ferrari, I believe that they have had the more responsive and adaptable car, maybe the easier car to drive for the majority of the season. However, with passing a works Mercedes engine on track almost impossible, they haven't been able to use their race pace as much as they would have liked. Then there's the reliability issues which arguably started in the first few races when they used a lot of power unit elements which came back to bit them with failures in Malaysia and Japan.
The defining moment of the season has to be Singapore though. Vettel and Ferrari were on pole with Hamilton and Mercedes back in fifth. Had they finished in that order, Seb would have headed to Malaysia 12 points ahead. However, we all know exactly what happened and in the end, it was Lewis who inherited the victory and extended his championship lead to 28 points, a crucial 40 point swing.
Personally, I think it's a mix of the two but I'd like to believe that Lewis/Mercedes have won this championship rather than Sebastian/Ferrari have lost it. I guess we'll never know how it would have gone had they battled all the way upto the final lap in Abu Dhabi. I also think that I could have made Verstappen/Red Bull an option for this poll as well, especially given his presence at Singapore and beyond.