This from Jim, in response to a post in another thread http://reduser.net/forum/showthread.php?t=41253 (my bold):
Slight advantage to Scarlet S35 (no FF35 Scarlet) at 3K due to pixel size and sensor size (5.4 micron pixels vs. 3.3 micron). But the 2/3" performs incredibly well for a 2/3" sensor. Incredibly well... did I say that?
Jim