opinion is based on person to person experience to me.
gs150: apart from weak front brakes and bad quality rear tire bike is excellent to ride with spares available at suzuki parts shops which are not so expensive.
cg125 classic : its on of the most demanded bike for the bikers who love thrill and speed and that trill end in hospitals with uncontrollable speed and way to much vibration also noise pollution is main problem with this bike i don't know how people bear its voice.
superpower: its replica of cg 125 in cheaper cost.
ravi storm: looks like it will vanish like dinosaurs, seriously ravi make fool out of our people when putting this bike in market for sale without available of spares. even Chinese 70cc bikes have more spares available then this bike.
well this my opinion with experience of riding bike for last 24 years in which i have kept almost every bike assembled in pakistan apart from 70cc's and also some jap models :).