lm2, running ondemand will speed the cpu up to 400 as demand increases over some present %age.

running a python GUI app tiself may trigger the increase and push cpu to 400mhz for reading the value.

using the command line is typically a LOT less strain on the system so the cpu will sit idle and be on slowest speed.

powersave should show 165 all the time, on demand should be variable, perforance should show 400 all the time.