Need some opinions from the experts. My Jacuzzi cartridge filter takes a Unicel C9475 or Filbur FC 1480. They look the same to me, the Unicel is 49.99 and the Filbur is 89.99. Big difference. the guy at the pool store said the Filbur is much better. Is this true? If it matters I toss the cartridge out at the end of the year and get a new one each year.