1. you can deattach or reattch datapump job.

2. you can parallelise datapump job [PARALLEL=4]

3. without export can do import using NETWORK_LINK parameter

4. can calculate export dump file size using ESIMATE_ONLY

5. expdp utility used which is caled by dbms_datapump procudure

6. remapping capabilities during import

[REMAP_DATAFILE,EMAP_SCHEMA,REMAP_TABLESPACE,REUSE_DATAFILES]