I have recently been trying Capture One and evaluating if it can replace Lightroom as my main processing software for wedding photography. After about a couple weeks testing Capture One, I can honestly say that this is a very powerful editing software. One thing that held me back are my LR presets. In years of doing and processing photos, I have saved a ton of presets in LR. My frustration comes with LR speed, in which they have somehow rectified with the latest update (7.2). However comparing the tools from both LR and Capture One, I can say that Capture One is a lot more flexible. I can place it in between LR and Photoshop.
This wedding below was all done using Capture One:
I'm also attaching a frame a bride below comparing Lightroom (left) and Capture One (right). Capture One can produce more pleasing results. I'm just starting to play around with it and I can already see the potential.