You guys may have seen this, but I found it interesting. Comparison shots between the Red One vs. 5Dmk2 vs. GH-1
[ame="http://vimeo.com/5981422"]Red One, Canon 5D Mk II, and Panasonic Lumix GH1 Footage Comparison on Vimeo[/ame]
The full HD files are available. All of the cameras seem to be hunting for focus as some point. LOL When they shoot the same shots they all seem somewhat comparable.
I guess that would be another reason for the fixed scarlet if it has autofocus and the rest dont.