They differ from chiffon in that soft silk is a little high in weight, glossy, and gives a party look. Chiffon suits both casual and party wear depending on the quality of the fabric and the design.
Chiffon sarees are synthetic sarees that are easy to wear and maintain. Just choose the design and color that fits the occasion, and you are good to go with either a casual or a festive occasion.
Another heritage sarees of India, soft silk sarees are in vogue since royal times. They are known for their quality fabric and signature style of jari and weaves.