Summery is that, compared to NCM, NCA inhibits thermal runaway at much lower temperatures, offers significantly less short circuit resistance, slightly less overcharge buffer before thermal runaway, significantly faster thermal runaway after overcharge buffer is exhausted.
The result of thermal runaway is fire or explosion.
Here's a scientific paper about the safety of various battery chemistries (warning, PDF): https://res.mdpi.com/wevj/wevj-06-00572/article_deploy/wevj-...
Summery is that, compared to NCM, NCA inhibits thermal runaway at much lower temperatures, offers significantly less short circuit resistance, slightly less overcharge buffer before thermal runaway, significantly faster thermal runaway after overcharge buffer is exhausted.
The result of thermal runaway is fire or explosion.