GST reconciliation

to finalize books we have to prepare gst reconciliation , but i am confused about that if we have 3B with diffrent values and rectified GSTR1 and books with same value. in that case books n GSTR1 values are same then we compare them to GSTR 3B but if we have diffrent values in all three how do we make reconciliation means which two we compare
3B with GSTR1
3B with books
GSTR1 with Books.

plz help members or if anyone have reconciliation formet of inward or outward reconciliation, please share