Using CFP, not sure if I should update (don't want CIS right now)

I’m being prompted for the update, but I don’t want CIS as of right now. If I run the update through CFP will it end up as CIS?

If you update it via the auto update you will get the firewall only.

I don’t recommend auto update from CFP to CIS, though.
Download the latest CIS, uninstall CFP first. Reboot and do a clean install of CIS, selecting only the firewall to be installed.