There is always more than one workflow for each camera, even for the RED you might do things a different way depending on the project and budget. Some ways are easier some are harder.
Alexa might be considered easier because it shoots ProRes files that can go straight into editing and grading without converting, but then again you could shoot arri Raw which is more of a pain in the arse than RED raw because of the size and the external recorders and whatnot. Also ProRes 4444 files are very heavy to edit, so one might make proxys anyway and the workflow would be similar to RED.
Some people (me included) feel the Alexa shoots nicer skin-tones than RED and has a better overall color-rendition (strictly personal opinions). That might save you some time in grading since the picture is kind of nicer from the beginning and doesn't need as much work to it as Red.
One of the most experienced colorists here where I live told me he felt the easiest footage to grade was 35mm followed by Alexa because it only needed one or two passes of cc, whereas Red almost always needed a separate pass for the skintones.
Red is always developing their color-space though, so this might change over time.
Just some thoughts, hope it helps!
Edited by Haris Mlivic, 21 March 2013 - 05:27 PM.