External nodes store all keys and values.

The same key can not be stored in internal node and external node.

Keys may be traversed sequentially faster in B+Tree than in BTree.

The same key can be stored in internal node and external node.

Leaf nodes are linked together.

Internal nodes store only keys.

External nodes store only keys.

Keys may be traversed sequentially faster in BTree than in B+Tree.

Internal nodes store all keys and values.