Most of the time when one product takes on another in a no-holds-barred face-off somebody walks away with a championship belt. Not this time. Here it's Gunleik Groven, Norwegian filmmaker and photographer, comparing the RED One Mysterium X and the Arri Alexa, two pro-quality shooters that come in at a price semi-pro producers can afford -- the RED clocking in at $42,485 the way Gunleik configured it, the Arri at $70,000. There are some obvious differences, like the RED shooting at 4K and the Arri at 1080p, but the vast majority of the comparisons here are far, far more subtle than that, meaning you're just going to have to pore over the comparison on the other end of the source link yourself and download the gigabytes of sample footage that's been thoughtfully provided. If you do need something of a conclusion, though, it's this: "These are both excellent cameras we could only dream of 5 years back... you cannot really complain on the equipment if you don't get your shot with either of these."