This means the second build does about 20% more damage without procs. Thunderfury's proc does about 62% of the damage of a HotA, or 52% of the damage of a Smash.
Assume you use Smash (which has a 66.7% chance to trigger procs like Thunderfury), so a Thunderfury proc is basically an extra 50% HotA.
Thunderfury needs about a 60% chance to trigger per HotA in order to surpass the damage from the second build. I've heard anecdotal evidence that the proc rate is much higher.
Thus, I would guess that Thunderfury makes up the difference in damage.
i have two barbs with the same build - us.battle.net/d3/en/calculator/barbarian#aZPdjR!ZYW!bZZZaa
1.
300 paragon
325% cd
42,5% cc
43% ias
2.19/2.04 aps
570k full buffed DPS
+13% HotA
+9,79% bonus to elites
+333% lingtning chance from Thunderfury
2.
240 paragon
459% cd
42% cc
50% ias
2.09/1.99 aps
767k full buffed DPS
+10% HotA
in general second barb has much more DPs, but killing Manglemaw in 19 sec
first barb - always in 13-14
why? only because those leet bonus and +3% hota?
570k dps * 1.027 (extra HoTA damage) * 1.0979 (bonus to elites) = 642.7k DPS (without Thunderfury)
This means the second build does about 20% more damage without procs. Thunderfury's proc does about 62% of the damage of a HotA, or 52% of the damage of a Smash.
Assume you use Smash (which has a 66.7% chance to trigger procs like Thunderfury), so a Thunderfury proc is basically an extra 50% HotA.
Thunderfury needs about a 60% chance to trigger per HotA in order to surpass the damage from the second build. I've heard anecdotal evidence that the proc rate is much higher.
Thus, I would guess that Thunderfury makes up the difference in damage.