Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_204_731 ( id number, "rank" number, "athlete" text, "shooting\nscore (pts)" text, "fencing\nvictories (pts)" text, "swimming\ntime (pts)" text, "riding\npenalties (pts)" text, "running\ntime (pts)" text, "total" number )

### Question ###
what is the difference between andrey moiseev 's total score and marcin horbacz 's total score ?

### Accurate SQL ###

SELECT ABS((SELECT "total" FROM table_204_731 WHERE "athlete" = 'andrey moiseev') - (SELECT "total" FROM table_204_731 WHERE "athlete" = 'marcin horbacz'))