Major Differences Between Blackarch Linux and Kali Linux?

What are the major differences between Blackarch Linux and Kali Linux? I have read articles online covering the same topic but they don’t cover things in detail also they don’t tell everything. I hope someone would answer this question. This may turn out to be a discussion thread also

Tip: Hackersploit forum should contain a separate category for Blackarch Linux or at least Arch Linux as it have for Kali Linux.