Cobra ecx 50 vs drr 50

New to the website, and need some advice please. My daughter is running a drr 50 with a few aftermarket parts (pvl, stage 6 cylinder, aftermarket exhaust, aftermarket suspension), and some misc odds and ends. We have this set up for harescrambles here in Florida. I'm considering investing in the malossi team cylinder, new crank, exhaust, carb, and fox floats. Plan to mount everything onto a new frame I have already, that's been coated.
Question is, would it be better to invest into this bike or just go ahead and purchase a stock cobra 50?
She's 6 years old, about 45lbs.
We are interested in running a few GNCC races next season, as well as the FTR series we currently run.

Any info is greatly appreciated.

Thanks,
Mike

i would stay with the drr for woods racing 4 sure!and from what i hear fox are hard to set up 4 the mini

pm sent

Thanks for the reply