Whirlwind Barbarian: ISTVAN’s vs. BUL-KATHOS’s.. which is better? Diablo 3 (2.6.1)

I had this video done during the PTR but totally forgot about it.
Bul-Kathos swords were buffed, so…. might be a potential return into WW meta build or Istvan’s still good enough? Let’s go into details here and uncover the truth!

Both builds here:

Bul-Kathos’s WHIRLWIND V2.0 GR100+

Istvan’s WHIRLWIND GR100+

Season 12 BEST Barbarian Builds for Diablo 3 Patch 2.6.1

Season 12 is right behind the corner and i wanted to compile a solid video for the community, showcasing all best barb builds possible. I went through all of them during PTR and pushed to the maximum limits possible for my paragon and gear. Some builds are a blast from the past while some are completely new.
Not many people actually read video descriptions, so to make it easier you can see all builds on my barb builds section here: https://www.angryroleplayer.com/diablo-3-builds/barbarian-builds/
In the video you can only see solo PUSH builds, however for speedfarming i recommend this build:

WHIRLWIND T13 “SPEED KING”

or this build:
http://www.diablofans.com/builds/95491-2-6-1-chaaarge-barb-txiii-speedfarm

Istvan’s WHIRLWIND GR100+ Barbarian WW Build for Diablo 3 (2.6.1)

Istvan’s WHIRLWIND GR100+

WARMUP for Torment 13 Barbarian Speedfarming Competition in Diablo 3

What a juicy rift, and i had just 18% cold here instead of 40% (found cold bracers later) . https://us.battle.net/forums/en/d3/topic/20759260985?page=1
Participating in the competition!
Rules: no DBs, just legendaries. I also picked up all the loot from RG, so lost at least 5 seconds each time.
Here is the build that i used: https://www.youtube.com/watch?v=ljBmuGMLpVA
http://www.diablofans.com/builds/79501-whirlwind-t13-speed-king
https://www.angryroleplayer.com/diablo-3-builds/barbarian-builds/whirlwind-t13-speed-king/