michalpolko/scriptdev2 — comment on commit 4c5215841d4720a241c781f29592c617b5b896f5
File: scripts/northrend/icecrown_citadel/icecrown_citadel/instance_icecrown_citadel.cpp line 314
By xfurry:

Ulduar has only 2 difficulties. The so called "heroic" chests are spawned when hard mode is activated. And you can have both normal mode and heroic mode chests spawned in the same time -> see Hodir.

This doesn't apply to ICC, so I think the naming suggested is fine.