MongoDB new secondary replica set node has much smaller data folder (dbPath)
Running rs.printSlaveReplicationInfo() on the Primary is not helping me figure whether the new node contains a full copy of the replica set.

Running rs.printReplicationInfo() is not giving me what I'm looking for either.

The answer lies in db.stats(); by comparing the number of objects and dataSize, of the primary and the new node, the new node is smaller. 

However, when comparing the new node with another secondary, the values very closely match! Real question answered! Except for that dbPath size difference.