Snapshot Replication would be good to use if:

1. if you are sure that you would synchronize only once in a day and your business requirements do not include replicating transactions as and when they are comitted on the publisher

2. If the size of the replicating articles is small – may be a few MBs/GBs

3. If it is does not matter that for some time the replicating articles would be locked (till the snapshot would be generated)

Transactional Replication would be good to use if:

1. You want incremental changes to be propagated to Subscribers as they occur.

2. The application requires low latency between the time changes are made at the Publisher and the changes arrive at the Subscriber.

3. The application requires access to intermediate data states. For example, if a row changes five times, transactional replication allows an application to respond to each change (such as firing a trigger), not simply the net data change to the row.

4.The Publisher has a very high volume of insert, update, and delete activity.