I'm still using On1 RAW since I went Fuji. It handles the Fuji files really well. It handles my Canon fine too. But I particularly like it for Fuji FAW files when it comes to shadows and color, etc. The modules like HDR and all that work really well too. I have not used Capture One so I cannot comment on that. I generally use On1 RAW for RAW manipulation and conversion. I finish off everything in Photoshop CS5.1 as a pixel editor. However, lots of things can be done auotmatically with On1 RAW and I like the export process as I can flag things, set them to be resized, output as TIF or JPG or whatever I want, etc. Pretty easy to batch organize and batch process. You can clean up most things right away. The noise reduction is pretty good and doesn't destroy everything. Sharpening works well, but I use CS5.1 for all sharpening anyways as I use different methods there (combinations of high pass filters & unsharp masks at pixel level and multi-iteration). I'm still using 2018 I think in On1 RAW, so I'll see after my updates and all and what the discount is for going to 2019. So far though, I've not wanted to move to another software suite yet.
Very best,