buenojust trying to help you make the best choice possible, why the gh5s over the gh5? I personally own the gh5 and have been shooting with it for a year and a half now and i love it. Something that continuously blows me away is the 5-axis image stabilization. which is something the gh5s doesn't have. Another thing is if the 240fps on the gh5s intrigues you, you can almost tell no difference between 180fps(gh5) and 240fps(gh5s). If you plan to be shooting a good amount in darker settings maybe the gh5s is the right choice for you but other than that id personally recommend the gh5.
Thanks for your input. I have also been shooting with the GH5, and love the IBIS, but in order to achieve a lot of the camera movements i do, i still use a gimbal, making the IBIS not as important to me (and handful of panasonic lenses have IS as well, so those can be useful when there is no IBIS). Also, here in Bellingham, its very dark in the forests and just generally dark in the fall/winter months, so im looking for something with better low light performance (i primarily shoot mountain biking, and am in the woods a lot). the high frame rates are cool, but not extremely useful as i rarely exceed 120fps.