Is SQL Server Snapshot Replication a Differential type of Replication

Hi, 

I am on my way to becoming a SQL guru but until then, I have been recently through alot of setups and created lots of replication and subscriptions and deleted them as well trying to figure the best way to set up sql server 2k8 r2 database replication. In the process, i have learnt alot regarding replication mostly not all fun stuff about replication.(the whole environment, i inherited and since they all work, im not breaking anything ;-])

Eventually, I decided transactional replication wont work for us since some of our tables are missing primary keys and mirroring isnt exactly our intention. 

We just want to be able to have at least a day old copy of the dbs that we can point/redirect applications to manually and relatively quickly and these includes a range of custom dbs to sharepoint dbs.

So, my question ...the snapshots pushed out by the publisher, are they differentials/incrementals(such that changes are merged to parked snapshots) or a full snapshot is taken every time the distribution agent runs?

OR

Better still, what other ways can I achieve my goal?


Thanks