Comapring two excel worksheets and adding or deleting rows as needed

Good Afternoon,

I am new to VBA coding and need help with excel VBA.

I have one work book with two worksheets, one is a current worksheet (S1) the other is an update version of the first(S2). All columns are the same and each will contain approximately 20,000 rows of data in.

1. I want to compare each cell in column A of S2 to all of column A in S1
a. If cell from S2 is equal to any cell in column A of S1 then do nothing
b. If cell from S2 is not equal to any cell in column A of S1 then add the corresponding row data to S1

2. Compare each cell in cloumn A of S1 to each cell in column A of S2
a. If cell from S1 is equal to any cell in column A of S2 then do nothing
b. If cell from column A of S1 is not equal to any cell in column A of S2 then do:
1. Create new worksheet (S3) and add corresponding row of data to new row in S3
2. Delete corresponding row of data from S1

If you need a sample of the workbook I can sanitize and supply, but preferable on to give out.