Devsuri parampara aur do-tithi parampara alag cheezein hain.

• Devsuri parampara ek acharya/guru-parampara hai — yani monks/acharyas ki shishya-guru line. Yeh monastic lineage ka naam hai. ( jainworld.com)
• Do-tithi parampara ek tithi-observance system hai — yani tyohar, pratikraman, ya vrat kis lunar tithi par mana jaye, iske niyam se sambandhit hai. Jain tradition me tithi par mahatva diya jata hai aur local sunrise, panchang-ganana, aur sampradayik niyamon ke hisab se fark aa sakta hai. ( jainknowledge.com)

Seedha difference:

1. Devsuri parampara = lineage / sampradayik shakhā
2. Do-tithi parampara = calendar/tithi ka niyam ( jainworld.com)

Jo 1986 me ek vibhajan ka zikr milta hai, usme bhi ek-tithi aur be-tithi systems ke matabhed ko karan bataya gaya hai. ( en.wikipedia.org)

Agar aap chahen, main ise bahut saral Gujarati-Hindi mix me bhi samjha sakta hoon.