Which is better? Sealy Posturepedic Spring Free Mattress or Simmons Comforpedic mattress? and Why?

I’m needing a king-sized mattress but am totally confused by what’s available. I currently have a Comforpedic and love it but the new ones are SOOOOO expensive. Saw the Sealy Posturepedic Spring Free Mattress today and really liked it but know nothing about it. Does anyone out there have experience with either one?