Thanks Paul - so the obvious question is, why?
Indeed. Like you, I can't see why the TL2 shouldn't benefit. In one of Jono Slack's posts about the new Summicron-SL's, he says Leica had a focusing "epiphany" a few months ago, including a new algorithm that predicted the correct direction of focus - hence the reason the 75 and 90 are so much faster than the Summilux-SL 50 (and perhaps why they are late to market wrt the road map). It makes one wonder if this trick has been introduced in the CL as well.
As a simple geologist, the technology of AF and camera firmware is beyond me, though. Perhaps the CL can supply more power to the lens now it doesn't have to supply the large TL2 LV screen? And we keep hearing about the two processors that Leica has used, Maestro I in the M240, and now Maestro II in the SL, M10, TL2 and CL - perhaps there's a slightly different version of the Maestro II in the CL which has better performance, or perhaps they're running the Maestro II in the CL at a higher clock speed? Who knows!
Edited by LocalHero1953, 18 January 2018 - 22:36.