Shiva is eternal but his family life duration is
https://en.wikipedia.org/wiki/Kalpa
https://08vk.blogspot.com/search/label/Gokarna
Common
Sati to Parvati -
http://shivadurga.blogspot.com/search/label/Sati
As seen by Kakabhushundi
http://08kk.blogspot.com/search/label/Boon
Different
Skanda is elder Ganesha is younger
Head cut of Ganesha by Trishul cause - Shiva
https://freeglobaluniversity.blogspot.com/search/label/Trishul
Ganesha Skanda competetion is for marriage - Ganesha marries Siddhi Buddhi
Ganesha is elder Skanda is younger
Head cut of Ganesha by Shani cause - Durga
https://freeglobaluniversity.blogspot.com/search/label/Justice
Ganesha Skanda competetion is for fruit - Skanda marries Vali / Devayanai
https://freeglobaluniversity.blogspot.com/search/label/Fruit
http://6tri.blogspot.com/search/label/KriyaIcchaJnanaShaktis
