CREATE TABLE table_204_495 (id DECIMAL, "date" TEXT, "opponent" TEXT, "venue" TEXT, "result" TEXT, "attendance" DECIMAL, "scorers" TEXT)

was the coventry city or west ham united with the more attendance ?
SELECT "opponent" FROM table_204_495 WHERE "opponent" IN ('coventry city', 'west ham united') ORDER BY "attendance" DESC LIMIT 1
SELECT "opponent" FROM "table_204_495" WHERE "opponent" IN ('coventry city', 'west ham united') ORDER BY "attendance" DESC NULLS LAST LIMIT 1