Product Details: 6-1/2" NVX X-Series 2-way Component System Car Speakers Power Handling: Peak: 600 watts per set / 300 watts on each side RMS: 200 watts per set / 100 watts on each side Carbon Fiber cone material Rubber speaker surround 1" Silk Dome Tweeters CEA-2031 compliant 1-3/16" Voice coil...
Outstanding German made silk tweeter unmatched at this price point, in my opinion.
Otherwise, the NVX V series is a little less money an probably comparable to the RF's budge stuff. RF makes some decent speakers, just in their higher end stuff.
The biggest difference will be in the tweeter and the crossover. Coaxials all **** IMHO.
I would go with the cheaper of the 2 and do my best to deaden the doors and seal the doors to make them act like a speaker box. Then use foam weather stripping to seal the mounting surface of the speaker to the door card so that sound doesn't get between the door card and the door.