Isn't the whole point of using EAC to rip the CD to enable you to get an exact copy?
Surely by ripping to an image using CloneCD you are relying on it's extraction method, which may not include EAC options like drive offset, specific drive extraction settings and error correction etc. all of which are tailored towards audio CDs ripping. Therefore once a CloneCD image is mounted and converted to MP3, which should work with any converter, including EAC, it won't properly use these features - all you are doing is converting files already held on your computer to another form (the process of ripping the original CD, which is where errors can occur, has previously been completed - by CloneCD).
If quality and accuracy is the main thing you are looking for I think the original extraction should be done by EAC. The only benefit I can see by using CloneCD is the one already given by philamber.
BTW this is just my theory when thinking through the process. It may be wrong so hopefully someone could confirm (or prove me wrong)!