SQL & PL/SQL

I like to compare if two indexes from both users are identical. Is there any way to to that. I need similer to below query:

select CASE (2*(select count(*) from (select * from XPKTBL_A INTERSECT select * from XPKTBL_A )) - (select count(*) from XPKTBL_A ) - (select count(*) from XPKTBL_A )) WHEN 0 THEN 'Indexes are identical' ELSE 'Indexes are different' END "Result" from  DUAL;

UserA:

create table TBL_A (       FIELD_A1 number not null,

FIELD_A2 varchar2(50),

FIELD_A3 date,

FIELD_A4 number(5,2) default 0,

FIELD_A5 varchar2(10) not null

                                );

                                create unique index XPKTBL_A on TBL_A (FIELD_A1);

UserB:

create table TBL_A (       FIELD_A1 number not null,

FIELD_A2 varchar2(20),

FIELD_A4 number(5,2) not null,

FIELD_A5 varchar2(10),

FIELD_A6 number(2) not null

                                );

                                create unique index XPKTBL_A on TBL_A (FIELD_A1, FIELD_A6);