Mountain weasel vs Stoat

The mountain weasel is heavier: 171 g against 119.4 g for the stoat, about 43% more.

What is the difference between a mountain weasel and a stoat?

Each point below is worked out from a pair of recorded values.

The mountain weasel is heavier: 171 g against 119.4 g for the stoat, about 43% more.
Both belong to the genus Mustela, so they are close relatives.
The mountain weasel is listed as Near Threatened on the IUCN Red List; the stoat is Least Concern.

	Mountain weasel	Stoat
Scientific name	Mustela altaica	Mustela erminea
Family	Mustelidae	Mustelidae
Order	Carnivora	Carnivora
Weight	171 g – 175.6 g	110.3 g – 324 g
Length	Not recorded	Not recorded
Lifespan	Not recorded	5 years – 11.1 years
Main food	Not recorded	arvicola amphibius, european hamster, ochotona, poponejo
Habitat	grassland, shrubland	forest, shrubland
Conservation status	Near Threatened	Least Concern
Countries recorded	Not recorded	1

A scale drawing needs a recorded length for both animals; only weights are on record for this pair.