well ill agree with bobby to some extent. here is detailed review

speedboost.sh -
pros
lowest cpu utilisation, substantial difference in NFSU game performance, UI remains super smooth

cons
terrible sound quality, very loud but audio sounds pure mono, artificial and superficial bass output.

boostn900.sh
pros
medium cpu utilisation avg 34 percent while playing music, music quality very good and appropriate bass output, NFSU game performance equivalent to speedboost.sh

cons
none so far

audioboost.sh
pros
same sound quality and output like boostN900.sh but with more thump and bass. cpu utilisation while playing music avgs 36 percent.

cons
sometimes a lill lag in UI while opening multiple windows, NFSU game performance is degraded after initial reboot, (relaunching the game improves the performance and is equivalent to the speed of boostn900)

note - using cpufrequi and applying 'ignore nice load' and 'smartreflex' UI in audioboost.sh makes the ui very smooth

p.s. battery yet to be tested in all the patches