Not sure if one really is better than the other; but my computer case has 6 fans in it including one huge one on one of the side covers and so far; Ive never had any real heat issues that Ive encountered. I can usually fix a heat issue easily by dusting out the dirt and or debris from inside the case and then possibly custom tailoring the power going to the case and or chassis fans using my motherboard utility program.
Also have a pretty bad speaker setup which is a klipsch promedia 5.1 surround speaker setup with huge subwoofer and lg blu ray player/writer. Also a hp officejet pro 8600 plus wireless all in one and a logitech s7500 webcam.
I have a 212EVO and it does a good job on my i5-2550K. I've not done any comparative tests though. It seems logical the CDC will do a little better by being able to absorb a bit more heat.
My Computer
At a glance
Windows 7 Ultimate X64 SP1Intel i5-2550K, Differing ~4.4-4.8GHz No buil...16GB G.Skill Sniper 1866MHz @ 2133MHz 2x8GBASUS GTX650TIB-DC2OC-2GD5, (650TI Boost)
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home Built Desktop By DataTech
OS
Windows 7 Ultimate X64 SP1
CPU
Intel i5-2550K, Differing ~4.4-4.8GHz No built in GPU
Motherboard
ASUS P8Z68-V PRO/GEN3
Memory
16GB G.Skill Sniper 1866MHz @ 2133MHz 2x8GB
Graphics Card(s)
ASUS GTX650TIB-DC2OC-2GD5, (650TI Boost)
Sound Card
Onboard Realtek 5-1
Monitor(s) Displays
Samsung P2570HD
Screen Resolution
1920x1080
Hard Drives
Samsung 840 Pro 256GB SSD for OS, 500GB Seagate Constellation (Enterprise drive) for Data
PSU
Corsair HX650W
Case
Inwin Dragon Rider
Cooling
Hyper 212 EVO w/two Noctua fans, push-pull, @1300 RPM
Keyboard
E-Z Eyes, bright yellow keys with large characters
Mouse
steelseries SENSEI Laser Pro Gaming
Internet Speed
48-51Mbs Mbs down, 11 Mbs up Xfinity Cable
Antivirus
Norton Internet Security 2013
Browser
IE 10, Opera, Pale Moon if needed
Other Info
4 case fans, LG BluRay-RE, ASUS DVD-RW, Mr. Fusion power supply, 1.21 gigawatts.