Those from 7 generations are dasharathri jnathas and those from 3 generations are trirathri jnathas. The questioner has correctly specified that 10 days asaucam for dasarathri janathas and 3 days asaucam for trirathri jnathas. But they differ when it comes to births and deaths. The details can be found in GSPK Sudarshanam’s “Theetthu Vivarangal” publication. https://www.sampradayamanjari.org/theetu-details