How do the EOS 5D Mark III ($3,499), the EOS C300 ($15,999) and RED’s Scarlet (the pixel champion! <$10,000) compare one to the others? Good question, and over at nofilmschool they tried to answer the question. And what would be better than a bike race shot at night? Spoiler: The C300 beats them all, much better performance at low light (not really a surprise). However, given the big price difference, the EOS 5D Mark III performance is worth of consideration. Quoting:
The biggest difference is just how much lighter the C300 looks than the SCARLET — [...] the M-X chips in current-generation RED cameras just don’t reach as well into the dark as the offerings from Canon [...] (the M-X chip is a few years old, after all). To me, the RED is more ideal for features and the C300 better for docs, but in either situation, if you’re going to be doing nighttime shooting without the ability to add light, the C300 is a far better choice.
The first part of the video gives no clues about which gear is used, it’s up to you to guess. The second part shows which camera was used.