Security of network tunnels between offices. Open VPN or Cisco?

Question

openvpn

Have a good day everyone!
Faced the following question:
There are several remote offices. All of them must be connected using tunnels into one network. At the same time, the network must remain operational if one or more offices have fallen off. This can be done in several ways:

1. openvpn
   
2. Cisco (L2TP/IPsec)
   

In my opinion, making tunnels on OpenVPN is more reliable (in terms of possible data decryption), on the other hand, OpenVPN is more difficult to configure than Cisco (taking into account that there will be more than 5 offices, "auto-raising" tunnels, routes, etc.). Although Cisco is reliable, but where there is a need for their traffic (and now it has been stored for many many years) they will be able to decrypt "who needs it." With OpenVPN, I think such a feint will not work with your ears.
The question itself is, is it worth it to bother with OpenVPN? Is it really much safer than Cisco and other solutions (taking into account the above thoughts)?
UPD. It's easier to live with Cisco since all the settings for tunneling, routing, etc. live in the same device, so the network layout with Cisco will be simpler and more elegant, there are also fewer points of failure. With OpenVPN, you will have to keep several devices (or software) one for the tunnel, others for routes, etc. .