SCD type 1 using staging table

Hi All,

I am working on dim/fact tables loading through SSIS 2012 and I have couple on questions on this.

Firstly, we all know ole db command is too slow for performing updates. So the work around is to use staging table (which I am using). The updates should be stored in the staging table and then updated in Dim table with join between staging and final Dim table. I am using the same approach for SCD type 1 Dim.

My ques is that I see some links that use checksum function to determine the changes. But if I dont use checksum and simply use lookup task for identifying changed/new records (based on the business key), is that correct? Here's the screen shot

The control of the pkg is

Thanks, hsbal