Sole F80 is 40 pounds lighter and holds 25 lbs more.The F80's reversible deck allows users to switch the deck over when one side wears out.
Additions in Sole F80
Rapid Sync Drive System allows rapid changes in speed & gradientCompatible with Aaptiv, Daily Burn, Peloton, Studio, etc.Audio in/out jack6" shorter & 6" taller
Additions in Horizon 7.4AT
Both treadmills are the finest available on the market and are quite similar. But when it comes to specs and functionality, Horizon 7.4 AT definitely wins.