Different bikes for different lives
The RadRunner 2 is a cargo-focused utility bike. The Cowboy 4 is a sleek, connected city bike. Comparing them directly is unfair - they serve different purposes.
If you haul stuff
The RadRunner 2 carries up to 300 lb, has a throttle, fat tires and a huge accessory ecosystem. It is the more practical machine.
If you ride for joy
The Cowboy 4 is lighter, faster and simply more fun, with a natural torque-sensor ride and an excellent app.
Verdict
Buy the RadRunner 2 for utility and value. Buy the Cowboy 4 for style, lightness and riding enjoyment in the city.