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_869 ( id number, "species" text, "country of origin" text, "total released" number, "first release" text, "last release" text, "areas of release" text, "areas established" text, "pasture type" text )

### Question ###
how many more bubas bison were released than copris hispanus linnaeus ?

### Accurate SQL ###

SELECT (SELECT "total released" FROM table_204_869 WHERE "species" = 'bubas bison') - (SELECT "total released" FROM table_204_869 WHERE "species" = 'copris hispanus linnaeus')