CREATE TABLE table_203_283 (id NUMBER, "#" NUMBER, "name" CLOB, "strike tone\ ( st-1/16 ) " CLOB, "weight\ ( kg ) " NUMBER, "diameter\ ( mm ) " NUMBER, "inscription" CLOB)

what is the difference of weight between the maria bell and the carolus bell ?
SELECT (SELECT "weight\n(kg)" FROM table_203_283 WHERE "name" = 'maria') - (SELECT "weight\n(kg)" FROM table_203_283 WHERE "name" = 'carolus')
SELECT (SELECT "weight\n(kg)" FROM "table_203_283" WHERE "name" = 'maria') - (SELECT "weight\n(kg)" FROM "table_203_283" WHERE "name" = 'carolus')