Kumho is even worse, no good whatsoever.    Buy Hankook!
To the contrary, CC6 & UC6 are the lowest, shittiest range from Continental!    Want good Continental tires then go with CSC5/6, or at the very least the new CPC6, and maybe the MC6 (but not MC5).
Newest/latest doesn't necessarily mean better, you need to look at the product range position if they're low range econo models like these 2 or mid range, or high performance range. Read my comment above. Btw their newest is no more CC6/UC6 but MC6 & Extreme Contact.