derbi gpr 50r vs aprilia rs 50

Have wanted one these for a long time.
Can any one comment on the pros and cons of the bikes. A Derbi of
similar mileage is a 300 to 400 dollars cheaper than the aprilia.

Thanks

 

They're supposed to be even better with the big bore (75cc) kit.
A 25cc increase may not sound like much, but it's a 50% increase
in displacement. With the kit, the bike is supposed to top out
at around 75 mph.

Jack Stanley