CREATE TABLE table_204_506 (id DECIMAL, "seasons" DECIMAL, "team" TEXT, "ch.wins" DECIMAL, "promotions" DECIMAL, "relegations" DECIMAL)

what is the difference between the number of wins pallac . reggiana reggio emilia has had and the number of wins progresso castelmaggiore has had ?
SELECT ABS((SELECT "ch.wins" FROM table_204_506 WHERE "team" = 'pallac. reggiana reggio emilia') - (SELECT "ch.wins" FROM table_204_506 WHERE "team" = 'progresso castelmaggiore'))
SELECT ABS((SELECT "ch.wins" FROM "table_204_506" WHERE "team" = 'pallac. reggiana reggio emilia') - (SELECT "ch.wins" FROM "table_204_506" WHERE "team" = 'progresso castelmaggiore'))