Complex sentence: Both probes contained more sophisticated instrumentation than the precursor "Pioneer" missions, including a camera capable of taking much higher resolution images, important for accessing the geologies of Jupiter's Galilean moons and the cloud features of Jupiter itself.
Split into simpler sentences: Both probes contained more sophisticated instrumentation than the previous "Pioneer" missions, including a camera capable of taking much higher resolution images. This was important for viewing the geologic features of Jupiter's Galilean moons as well as the cloud features of Jupiter itself.