Originally Posted by
RamiZ
Nope, sadly, Ultras are just worse in every possible way than Brood lords(except if your enemy is already behind). Thors are getting bugged by Broodlings, also do very little to Brood Lords, while they kill Ultras pretty fast, with or without their 250mm cannons.
Ultras just aren't cost effective in comparison to any other unit. Their reduction on building time helped quite a bit for tech switching in the late game, but if you go straight for the Ultras, and lose that fight(with 6-7 Ultras dying) chances are pretty high that you won't be able to come back, where 5+ Brood Lords won't do any damage only if enemy has Vikings/Void Rays, and you don't have anti-air at all.