The FFXIV Sea Wolves hail from the islands of the far north seas

Hellsgaurd(Or Lohengarde) Roegadyn have an "Ash Puppy Nose". There is some speculation that this marking can be removed as there are some NPCs without it (Curious George). Lohengarde hail from the Volcanoes of Abalathia's Spine Believing the mountains of flame to be gates to the underworld, their line has for centuries stood vigil over them to prevent the passage of souls back to the realm of the living. Their sheer girth and steely demeanor open to the Hellsguard a wide range of paths, from the martial to the monastic. 

Hellsgaurd skintones are mainly Red hues.

Sea Wolf Roegadyn, do not have the Ash nose that the Lohengarde have. The FFXIV Sea Wolves hail from the islands of the far north seas, where they subsist as fishermen and -women. Long ago, no vessel or coastal village was safe from their maritime brand of brutality. Now, it is not uncommon to see them employed as sailors or naval mercenaries on all manner of vessels.

Sea Wolf skintones are mainly Green hues.

Fun Notes:

Min Female Roegadyn is the same as Max Height Female Highlander.

Although Moenbryda is a Roegadyn she does not have the Reddish Skintone of a Hellsgard or the Green skintone of a Seawolf, hers is the same as a Miqo'te.

Roegadyn Dictionary

Roegadyn Naming Conventions