Here is a quick comparison of Build 16 RED ONE and a popular professional DSLR, the Canon 1D MKIII. I picked the 1D MKIII because it is the newest, highest quality Canon with an APS size sensor. I have cropped and scaled (slightly) the Canon to match the RED 2:1 format. I open the Canon file in Adobe RAW and opened the blacks because Adobe crushed them on open. Then I matched the two together (as best as possible) without inducing any weirdness. I have been doing this stuff a long time, so I am comfortable in the process. I encourage all of you to do similar tests on your own.
I used a RED 50-150mm zoom and the Canon 70-200mm f/2.8L IS USM zoom (newest version). Both were shot at ISO 320 and f5.6. I think I have successfully deleted the metadata, so that won't help you.
Focus was on slight different parts of the pic... sorry about that. Makes you check more closely. :-)
Please DO NOT copy these images and paste into a reply for bandwidth sake...
You tell me which is which.