CX350 has better codec with 10bit 4:2:2, larger sensor, wider lens, NDI
Z190 has three 1/3 sensors, electronic variable ND, 4 channels of audio, longer zoom range, 1.6f aperture, face detect AF with joystick to select which face to focus on.
Which one is better? It depends on what features are more important to the type of work you do.
While the Z190 does get more telephoto the CX350 starts considerably wider. The Full Frame 35mm equivalent wide field of view for the Sony is 28.8mm while the CX350 equiv. wide FOV is 24.5mm. In my personal experience the wide end is the most useful.
Numerous anecdotal indications can be found online to the effect that the low light performance of the Z190 is very poor. In fact even Doug Jensen, who created the definitive online course on Sony's Z190 and Z280, has described the low light performance of the Z190 as being "terrible," and almost four stops worse than that of the Z280.