I think stock is HAVS CFS, i definitely find these laggier.
CFS = Completely Fair Scheduler. Historically this Scheduler is used for high end desktop machines.
BFS = Brain F*ck Scheduler. Certainly my preference.
These 2 schedulers can be used in Conjunction with HAVS or SVS.
SVS = Static Voltage Scaling. Each Step of Mhz in the clock speed table as a specified voltage. when Mhz = x, mV = y
HAVS = Hybrid Adaptive Voltage Scaling. Like SVS, however it takes a 3rd thing into account. Temperature.
HAVS is generally better on battery by a nominal amount but is not always stable for everyone. Its got much better recently, but SVS is more stable.