Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Whisperer's Echoing Steps Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Whisperer's Echoing Steps suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Similar Items
The 2 items nearest to Whisperer's Echoing Steps (item level 437) in item level among Armor > Leather, Feet slot, from item level 330 to 545.
Blizzard numbers items as they are created, so the named items next to ID 221169 (221164 to 221174) were usually added in the same batch as Whisperer's Echoing Steps: the same quest line, zone, vendor or reward set.