making sure a variable doesn't equal another variable

I do this:

<cfscript>

    IsUnique_Voucher_Number=False;

</cfscript>

<cfloop condition="IsUnique_Voucher_Number EQ False">

    <cfscript>
   
        Unique_Voucher_Number=RandRange(0, 99999999, "SHA1PRNG");
   
    </cfscript>

    <cfquery name="Query_Check_Voucher_Number" datasource="#Request.JustInLime_DataSourceName#" result="Query_Issued_List_Result">
        SELECT
            Lower(JustInLime_VoucherNumber) AS JustInLime_VoucherNumber
        FROM
            #Request.JustInLime_DatabasePrefix#_Issued_JoinOnline
        WHERE
            JustInLime_VoucherNumber=<cfqueryparam cfsqltype="cf_sql_varchar" value="#Unique_Voucher_Number#" />
    </cfquery>

    <cfif Query_Check_Voucher_Number.RecordCount>

    <cfelse>

        <cfscript>

            IsUnique_Voucher_Number=True;
            Form.JustInLime_VoucherNumber=NumberFormat(Unique_Voucher_Number, "00000000");
       
        </cfscript>
   
    </cfif>
   
</cfloop>