I think you need to separate competitive advantage from overall user experience.
Motors are the same, most sensors are the same, so a typical small student program will work pretty much the same way.
But we have built in IMU and built in radio.
We have ability to store more programs that can have more advanced capability.
We have double the number of I2C busses that connect to the sensors and motors, and they have better recovery mechanisms so no more “I2C error detected” messages that need a full brain reset, you can still potentially lose comms with sensors if a cable comes loose, but others will continue to work.
we have SD Card support.
USB C connector 
wireless programming through the controller.
better BLE support.
more advanced dashboards
some support for non-competition use where 4 of the ports can be used as raw i2c, asynchronous serial or digital IO.
built in log like the V5.
all motor/sensor firmware is inside the brain and it will update devices as necessary.
UI in 6 languages, more will come in the future.
and many other small improvements.