rpmsg_service vs ipc_service

[pbtgit]

I need to create a "serial link" between NRF5340 NET & APP CPU - on APP i want to keep
Zephyr but on NET CPU i want to implement the link using OpenAMP.
The spinel inplementation for NRF5340 is using the Zephyr IPC Service and looks promising blueprint but it seems much more complex to implement than the rpmsg_service samples - why is this so? What would be the advantages using the Zephyr IPC service ?

Looking at the even lower layers, it appears the simplest way in this case would be based upon the OpenAMP directly? That seems to be the thinnest porting layer.

Best
Peter