We've shot 3 projects using both the RED MX and the Scarlet-X, interchanging the same lenses between the cameras as required. I must say that to my eye the RED MX is producing consistently less noisy, 'smoother' looking images than the Scarlet-X when evaluated on a 2k monitor. The Scarlet-X is set up to match the settings of the RED MX, but the RED MX just seems to produce higher quality images.
Has anyone else noticed this difference? I read in earlier post that the RED MX and EPICS have the 'A' grade sensors but I didn't expect the difference to be that noticeable when compared to the Scarlet-X (especially with respect to the noise level).