@Tina
I've not tried the Da Vinci 5590 Petit Gris Mix before so I can't say much.
The squirrel brush is usually used as a mop brush to paint or wet large areas where you don't need details, that's why you don't need the squirrel to go back to its shape.
A sable brush of the same size would be significantly more expensive. You can use a sable brush for the same purpose as well, but doing so will wear off the brush faster. So it may be better to use a squirrel for those large washes, and even if the squirrel wears off, it's perfectly fine. But when a sable wears off, it would lose its sharp point.
@Tina
I've not tried the Da Vinci 5590 Petit Gris Mix before so I can't say much.
The squirrel brush is usually used as a mop brush to paint or wet large areas where you don't need details, that's why you don't need the squirrel to go back to its shape.
A sable brush of the same size would be significantly more expensive. You can use a sable brush for the same purpose as well, but doing so will wear off the brush faster. So it may be better to use a squirrel for those large washes, and even if the squirrel wears off, it's perfectly fine. But when a sable wears off, it would lose its sharp point.