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

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')