I have two characters:
(1) A Khajiit wearing 5 pieces Night Mother's Embrace and 3 pieces Night Terror, with all-medium armor, and racial stealthiness maxed out. Her detection distance from a typical NPC is 1 meter.
(2) An Argonian wearing 5 pieces Night Mother's Embrace, 3 pieces Night Terror, and 4 pieces Darloc Brae (obviously all-medium armor). She has no racial stealthiness, but she does have an additional stealth radius shrinkage from the Darloc Brae that the Khajiit doesn't have. Her detection distance from a typical NPC is 2 meters.
Why?
"Argonians have fat, scaly tails." —Rissa Manyclaws.
"Once upon a time there were three sisters: Delicious, Delightful, and Disgusting. Now, Delicious and Delightful were both very pretty girls..." —Brendalyn Jurarde.
"I smell to the nobility." —Indrasa Avani.
"A bargain with an animal is not a contract made." —Haderus Atrimus.
"Redguard makeup for sale. Free samples. Secret ingredients. Unique application method. Lots of satisfied customers." —The Mudball Goblin (aka, Cognac Vinecroft)
"Your armor looks like underwear." —Shuns-the-Knife.