Here is a visual comparison of the prototype, WIP model of the Geopelia (left) and the in-game, final model (right).
Differences- Bottom engines are blue.
- It has a more conventional jet sound as opposed to the XR-900.
- The flames that come out of the upper engines are freaking big.
- Lack of any details in the bottom of the plane (just plain gray)
- The rest of the grey-colored part of the plane also displays a distinct lack of detail.
- The Prototype has flames, the final model has Aeon particles.
- Top speed: 2856 km/h
- Missile payload: 199
Thanks to:
Fabian for the screenshots and text.