systemd sysvinit initd container

Any pro/cons on using sysvinit or systemd in LXC container (obviusly with a guest OS that support both and latest proxmox version)? I've seen that: - downloadable template "debian-9.0-standard_9.5-1_amd64.tar.gz" use systemd - while any template build with DAB make use of sysvinit (at least...