How to Compare two filtered tables derived from same table

[stillground_ca]

Hello,
I have the Dax code below. All works fine except the code after RETURN. I am working with Dax Studio. I want to return list of Customer IDs in 2014 that are not in other years. Kindly help resolve. Thanks

EVALUATE
VAR main_table = SELECTCOLUMNS(Orders,"Order Dates",Orders[Order Date],"Customer IDs",Orders[Customer ID])

VAR  table1 = FILTER(table1,Year([Order Dates])=2014)

VAR  table2 = FILTER(table1,Year([Order Dates])<>2014)

VAR Distinct_table1 = Distinct(SELECTCOLUMNS(table1,"IDS-1",[Customer IDs]))

VAR Distinct_table2 = Distinct(SELECTCOLUMNS(table2,"IDS-2",[Customer IDs]))

RETURN

Filter(Distinct_table1,[IDS-1] NOT(Distinct_table2))