Folders are more lightweight than baselines, therefore DCM transfers are faster with folders.
If you do transfer baselines, note that the satellite database projects update members based on the latest baseline, regardless of which database it came from. Therefore, be careful not to receive from a remote database a newer baseline that does not include your local tasks.
If you transfer baselines, the best method is to create all baselines in the master database. Then, configure the satellite database process rules to be based on the latest baseline plus all local completed tasks.