Difference between Sequential File and Data Set - DataStage

What is the difference between Sequential File and Data Set?

Sequential File :

-The extraction and loading of a sequential file is limited to 2GB

-Converted into native format from ASCII, if utilized as source while compiling

-The processing is sequential

-Processing is done at the server

Data Set :

-It is an intermediate stage

-Compile time conversion is not needed.

-Supports only .ds extension

-Processing is done in local system