aayushsrivastava14 :
fadaboey :
5820k>6700k.
End of story.
No. 5820k is a 6-core processor whereas 6700k is a quad-core that's why broadwell CPU has a gain there.
I'm pretty sure everyone here knows the 5820K has 6 cores and the 6700K has 4 cores.
I believe the point here is that, if a i7-6700K goes for around $430, or so, and an i7-5820K is at $390, the latter is a better deal for less money with more cores, and more PCI lanes, and it beats the i7-6700K in many benchmark tests.
Each require their own special motherboard and DDR4 RAM, as the 6700K will in most cases, so the cost/benefit seems to favor the 5820K. One might be able to overclock a 6700K higher for a greater single core performance gain but is it really worth it in the long run? SLI and crossfire have better performance on the X99 - 5820K platform, too. So, the 5820K still seems the better choice, especially if one does any video coding/editing/Twitch/YouTube videos in addition to their gaming.
I suppose, in the end, the choice between which to go with may just be more of an individual preference, than anything else. Some just might want to overclock as high as they can go and think the 6700K offers them more there, while others might like the 5820K's solid, more core, beefy cpu performance that currently appears to cost less. Probably can't go wrong either way. Computing is getting so high end for even the average consumer that performance gains will most likely be unnoticed in real world computing activities.