I think from everything i've read in the last 8 months or so
I'm very confident of an 6core zen being at least 25% faster than a i7-4770K
inb4 someone laughs at me
if anyone thinks AMD will put will bring out a chip that is slower than a 2gen old intel
then in my eyes and a lot of others AMD is finished (at least in the enthusiast market)
and if they're actually slower then they better be at least 50 or even 100 less than the comparable intel chip.
While on polaris i really don't know what to expect.