It depends on what your priorities are. The zs 100 has the 1" sensor for supposedly sharper pictures and gives up zoom and tilt screen for picture quality. So far I'm very happy with the picture quality.
I use an Olympus OMD EM5II with an Olympus 14-150 lens for travel photography where I'm taking pictures for my and the family's enjoyment. The 14-150 is equivalent to 28-300 in 35mm. The camera and lens are waterproof and have 5 axis stabilization. I'm usually very happy with the photos.