When it is better to use insulated round pin terminals НШКИ instead of НШВИ?

Both types have the same contact part, both have the same shape of a pin after crimping, both types are designed for connection of stranded cables. Pin rounded end sleeves are more expensive. The reason for that is in their wider function: round pin end sleeve with red cuff performs the same function as 4 insulated end sleeves НШВИ in the cross-section range from 0.5-1.5 mm²; round pin end sleeves with a blue and yellow cuff covers the same functions as two types of common insulated end sleeves НШВИ.