More aboutintel chipset line ups higher digit number performance
Well not really 4790K is more powerful than 4820k, its just that 4820k has more cache and supports more RAM. 4790k is better for rendering/ editing purposes. 4820k is better for server type uses. Both are beasts in gaming
Not necessarily. First off you're talking about two CPUs from two different generations. The 4790K being *Devil's Canyon, and the 4820K being IvyBridge-E(?). Now if you would be speaking of two chips in the same generation, and the same line of CPUs, yes you would be correct. i5-4590 vs the i5-4690K for example.
Short answer: Yes, and No. Yes in that's typically how companies will label their products; higher is better. No, in that in this case, the 4790K, on paper, is much better than the 4820K.
The 4790k is not Haswell-E. It is a Haswell refresh CPU a.k.a. Devil's Canyon. They are not just generationally different, they are also a total different platform.