Should i do Palo Alto Networks Certified Network Security Administrator or Palo Alto Networks Certified Network Security Engineer cert?

I am a L2 network engineer with 7+ yrs exp. We have recently installed palo alto firewalls in our project & our scope is limited to allowing firewall rules and troubleshooting few firewall issues whereas VPN tunnel config, etc is taken care by L3 team. Another of my objective is to be able to answer questions related to site-to-site VPN and remote-access-vpn creation in interviews.

Given this, should i do PCNSA or PCNSE? Can someone tell me the important addl topics covered in PCNSE?