Is Stellina more powerful than Vespera?
Stellina has a larger aperture and focal length than Vespera. It integrates in addition to Vespera a light pollution filter, an anti-fog system, a field rotator, a USB port for raw file recovery, ... It also offers a better resolution.
For people looking for a powerful instrument (astronomy and image processing enthusiasts), Stellina will offer more possibilities than Vespera because its manual mode is more advanced.