mini dock question

[vi]

Hi ppl please explain me difference between port replicator and mini dock.

1) i am confused to see that mini dock coming with 120W AC adapter (now i have 2374-E18 model and i am using 72W adapter)
2) i do not see my lappy in compatibility matrix http://www-307.ibm.com/pc/support/site. ... MIGR-45932 - there is no 2374 models.


now i am thinking to buy PRII or mini dock. Minidock for me is better than PRII because USB-Hub. But i am confised...... because of incompatibility problem