The whole process takes 15-20 seconds (scan BP, scan fingerprints, and employee taps OK). Unless there is zero people in the Pre-Check line (never the case at DEN on days that I travel), CLEAR is faster for me.
We're flying on Friday morning, and I will wager CLEAR will save us many minutes. I couldn't even fathom how early we'd have to arrive if we had to use the regular security line.