A parabolic mirror(the good one) has a single focal point. Therefore the image is color-accurate and sharp. A spherical mirror(the one NG 114 has) has multiple focal points. Therefore Meade used a “corrector lens” to fix the optics. The problem is a spherical mirror corrector lens is incredibly hard to manufacture and insanely expensive.
The one StarNavigator NG 114 has is not well-built and is not working properly. That is why the telescope is so cheap.
It doesn’t make sense to talk about the Planetary and Deep Space performance with StarNavigator NG 114. The optics are hard to focus, collimate, and don’t provide the crisp images any astronomer wants.