Difference between products and plans in ZOHO Subscriptions

Difference between products and plans in ZOHO Subscriptions

Hello,

I would like to know the difference between products and plan in ZOHO subscriptions. I sell church website design services and would like to set up a package whereby new clients can choose between different packages that offer both the initial setup as well as ongoing monthly hosting. I see how I can do that with a plan ... however, I would also like them to be able to choose add-on services IF THEY WANT THEM (such as our ability to migrate sermons from their old site to our new one. Can this be done using products??

Thanks,
Mike