Short answer: The idea is reversed.

• Shvetambar tradition: Paryushan is 8 days and ends with Samvatsari (the main forgiveness day).
• Digambar tradition: Das‑Lakshan Parva is 10 days, each day devoted to one of the ten supreme virtues (Uttam Kshama, Mardava, Arjava, Shauch, Satya, Sanyam, Tap, Tyag, Akinchanya, Brahmacharya). It usually concludes with Kshamavani (forgiveness).

Why the difference in length?

• It is due to sect-wise tradition and focus, not because one festival is “more.” Shvetambar Paryushan concentrates eight days on intense pratikraman, svadhyaya, fasting, and culminates in Samvatsari. Digambar Das‑Lakshan assigns one full day to each of the ten virtues, therefore 10 days.
• Both emphasize the same spiritual essence: self‑purification, restraint, study, repentance, and universal forgiveness.

For simple explanations:

• Paryushan (8 days)
• Das‑Lakshan (10 days)