They are not the same thing.
SAS/ACCESS is a data bse engine that leats you read/create data in an external RDBMS (like Hive) from a SAS session, using SAS code, like SQL, data step and procedures.
Data Loader is a package, with an application that lets you do data management stuff via a UI.
Not sure if SAS/ACCESS to Hadoop is included in that package, but similar functionality definitely is.
And there are more functionality available in the Loader, like in-database processing (which could be purchased as an add-on to a regular SAS/ACCESS license).
Check the product pages for each product as support.sas.com, they are quite informative.
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