To be exact
Roadprince wego is kind of a copy of derbi.
Derbi uses slightly higher quality parts.Also derbi brand is known
the base model is used (both derbi and roadprince) by various manufacturers like, zongshen,Aprillia,another Chinese company.
the main different is the quality of parts and derbi or aprilia (Piaggio owned) uses better parts as the bike has been reviewed by international communities as well.
Also the most parts where i spotted the difference are
Meter on RP wego is fake it uses fake computer check derbi checks in realtime
Engine is a bit changed
rest is mostly the same
I doubt the quality of main parts like engine , transmission etc as often local dealers go for cheap alternatives.
I am no expert at all , hop some other member also guides you.