^^^^ on the trail that I usually ride, I'm am actually faster on the hardtail with lockout on that I was with the old full suspension (it is a mostly smooth, fast single track with just the occasional root and rock).
But my favorite trail that is around an hour away, I am a little scared to try on the ht to be honest. It is nothing but super rocking and rooty climbs and descents, including this, and I'm not 100% sure about riding down this on a ht.