What is the difference between DB2 API Stage and DB2 Enterpr

[dsxdev]

Hi,
What is the difference between DB2 API Stage and Enterprise Stage.
I know that API runs in sequential mode while Enterprise Stage can run in both parallel and sequential mode.

What is the difference in the logging modes of these stages and what are the different features that are different in these stages.

I observed that when rlogin does not work for an account, we cannot use Enterprise Stage with that account.