Which Plugin to Choose – Cloner or Blog Templates?

I have a theme on a multisite network that I want to use as the basis for the majority of other sites on the network. I have the theme settings all configured how I like them. Now I just need to copy across to other sites.

These other sites have already been created (although aren’t active) so I’m looking to overlay the theme and settings on the existing sites. > this is not essential just preferable.

Which plugin (Cloner or Blog Templates) would be better suited to this job. I’ve used both plugins for other purposes and they work great. It’s just that their main prupose is in creating new sites, not updating existing ones. Is there a workaround for this, or is the better solution to just delete existing sites and start again with cloning or blog templating instead?

thanks for any advice. cheers