Is possible to have multi site within a single project maven where they don't use the same core, apps and content folders ?
For example in a same project maven I want to have a first site www.site1.com and second site www.site2.com and I want that the site1 has core, apps and content separate of the site2.
As @Jaideep_Brar already mentioned it's all about the maven structure.
You just have to create multiple sub-modules, which contain the bundle, the templats/components/dialogs for a single site. You need to ensure that both are not deploying to the same repo location and do not have clashing bundle names. But besides that it's pretty straight-foward.