Calfskin seems to be easier to care for than lamb. However i dont have any lambskin bag (as i'm scared of scratching the leather), I wont be able to make a fair comparison. Calfskin is a little more delicate than caviar. It can handle bumping into things relatively well BUT it is quite sensitive to being pressed against hard object (like a brooch). It will leave a dent the leather where a caviar wont.