The primary choice comes down to your gear preference. In the BTS package, both models share the same "slippery" airframe and high-performance DNA, but they offer distinct ground and landing experiences.
The "better" model depends entirely on your preferred flying style and landing environment: fsx bts vans rv 7 7a better
If you want to understand why pilots rave about the RV series, you need to look at the payware giant of the FSX era: . The primary choice comes down to your gear preference