CREATE TABLE table_203_494 (id DECIMAL, "party" TEXT, "votes" DECIMAL, "%" DECIMAL, "swing" DECIMAL, "seats" DECIMAL, "change" DECIMAL)

which party held the most seats but had a lesser turnout ?
SELECT "party" FROM table_203_494 ORDER BY "seats" DESC LIMIT 1
SELECT "party" FROM "table_203_494" ORDER BY "seats" DESC NULLS LAST LIMIT 1