I think i read somewhere that CCE can clean Viruses that CIS can't...
Hi tretas,
I'm not sure what & where you've read, but you probably read that despite you can run either CCE or KillSwitch you
must not ever act upon their detection(s) - you system can be destroyed in no time before you can get help from any professional certified malware fighter
That's why on a first-time installation, there should be a CCE run. And not every users do think about getting CCE+CIS. So, CIS sould Install and run CCE tech on the first-scan. Then remove it if you want, but i think a it should be scanned whit CCE automatically when installing CIS.
Therefore I repeat myself again ... NO! Those Tools should not be offered to public (which is mostly less experienced users or users having no experience yet at all)
The said Utilities are for, say Geek Buddy, or other gurus, who can analyze the system & provide assistance with malware removal
At the moment, having some experience & being somehow involved ...at least by observing many "Removal sites", I haven't seen any certified maware fighter using the neither CCE not KillSwitch
Moreover, as soon as they dealing with infection where CIS is installed the 1st advice is - disable Comodo's Sandbox
in the 1s place / then sure AV (must do - no matter what Av) & Comodo's defense+ / ... plus in some cases complete uninsallation of CIS required, after which removal hopefully would be possible by using many different; known; acclaimed removal Utilities
Then, I'm sure that you'r aware of - there is no security yet developed (and never will be in foreseen future) which is (will) be capable to remove all infections
Moreover, after some "silent time" recent strain of infections managed to
"learn again" 
hehe! how to substitute system files.
So, if you are courageous enough trying to even quarantine those if
any AV (stressing) , or CCE or KillSwitch correctly identify those. Your system is dead instantly!
reminder: always backup your precious data; have OS image (I do not mean CTM snapshot!)
So, asking for CCE being included into the Suite and be running as 1st "defensive force" is just - going for a system Kill...(switch off

)
Cheers!