What is the difference between autoimmune pancreatitis 1 and 2?

Histology (no damage of ductal epithelium in 1 while in 2 we have destruction) IgG4 (present in type 1 and absent in 2) Age (60-70 in 1 and 40-50 in 2) Gender (male for 1 and both for 2) Clinical presentation (more obstructive jaundice in 1 and more acute pancreatitis pain in 2) Pancreatic imaging (more diffuse enlargment in 1 and more focal enlargement in 2) Other organ involvement (more in 1 than 2) other diseases (strictures, pseudotumors in 1 and IBD in 2) Relapses (frequent in 1 and rare in 2)