According to Cnet, despite a lengthy company history and worldwide brand recognition, NortonLifeLock just hasn’t put its best foot forward with Norton Secure VPN. It’s got a long way to go before it can best a heavyweight VPN like NordVPN. The two are still worth comparing, however, due to their dominance in the market.
The Norton VPN is slower and less secure which is a serious disadvantage. It does have assets but since you are focusing on the security factor, you have your answer.