Mahaveer

 https://www.google.com/search?q=Mahaveer+Karna

Mahavir

 https://www.google.com/search?q=Mahavir+Karna

Vishnu Sahasranama

The most popular version of the Vishnu Sahasranama 

1. is featured in the Anushasana Parva of the epic Mahabharata. 
2. Other versions exist in the Padma Purana, the Skanda Purana, and the Garuda Purana.
3. There is also a Sikh version of the Vishnu Sahasranama found in the work Sundar Gutka

Karan Sameer

 https://www.google.com/search?q=Karan+Sameer

Family

 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

https://freeglobaluniversity.blogspot.com/search/label/Marriage

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