Full & Differential Database Backup using T-SQL/SSIS

Hi,

I am trying to create Full and Differential backups using SSIS/T-SQL (Execute SQL Task). I have one pkg for Full backup and 1 pkg for Differential backup.

For FullDB Backup pkg, I am using the following query.

BACKUP DATABASE MyDB
TO DISK = 'C:\Folder1\FB\FB_MyDB_DATE.bak'
   WITH INIT;
GO

For DifferentialDB Backup pkg, I am using the following query.

BACKUP DATABASE MyDB
TO DISK = 'C:\Folder1\DB\DB_MyDB_DATE.bak'
   WITH Differential;
GO 

Is this right? According to the followingdocument, do I need to run both queries together or the above scenario works?

I will need to run Full Backup pkg on Mon/Wed/Fri and Differential pkg on Tue/Thur/Sat/Sun.

I noticed that Differential.bak is much greater in size than Full.bak.

Am I doing this properly? (I need to have two different pkgs for both types of backups).

Thank You