Alpaca vs Mohair

Alpaca is warmer and softer. Mohair is more durable and more lustrous.

AlpacaMohair
Typical diameter18–32 µm23–40 µm
SourceAlpacaAngora goat
LanolinNoLittle
Warmth★★★★★★★★★
Softness★★★★★★★
Durability★★★★★★★★★
Luster★★★★★★★★
Elasticity★★★★★★
Price$$$$

Bottom line

Warm for its weight, lanolin-free, silky hand; less elastic than wool.

Very strong and lustrous with a fuzzy halo.

Choose alpaca for warm, drapey, lanolin-free garments; choose mohair if you value more durable and more lustrous. Blends often give the best of both.

Mohair is a fabric or yarn made from the hair of the Angora goat. Both durable and resilient, mohair is lustrous with high sheen, and is often blended to add these qualities to a textile. Mohair takes dye exceptionally well. It feels warm in winter due to excellent insulating properties, while moisture-wicking keeps it cool in summer. It is durable, naturally elastic, flame-resistant and crease-resistant. It is considered a luxury fiber, like cashmere, alpaca, angora, and silk, and is more expensive than most sheep's wool.From Wikipedia — “Mohair”, licensed under CC BY-SA 4.0.

FAQ

Is alpaca better than mohair?
Alpaca is warmer and softer. Mohair is more durable and more lustrous. Warm for its weight, lanolin-free, silky hand; less elastic than wool. Very strong and lustrous with a fuzzy halo.
Is alpaca warmer than mohair?
Yes, alpaca is generally warmer for its weight.
Is alpaca softer than mohair?
It depends on the grade: fine alpaca (18–22 µm) is very soft, while mohair typically measures 23–40 µm.