I purchased the Leica M11 'Spectre' profiles on cobalt-image.com. The package contains profiles for different use cases and color temperatures for ACR/Lightroom and Capture One.
To avoid sample bias, here are 3 images (daylight and tungsten) developed with Capture One ProStandard and Capture One Spectre profiles. I labeled them A and B (not telling you which is which) to help you decide which one you like better (or if there is a consistent winner for you).
Thanks for opening this thread. I vote A is Cobalt Spectre. I hope you will share your overall insights and findings for these profiles with Capture One. Most of the videos and comparisons I’ve seen have been LR/Adobe profile related. I also have a few of their LR profiles (pre-Spectre) and found them beneficial, but I really want to hear real world experience with Capture One. Especially with Spectre since the base profiles come at a price increase that makes me reluctant to buy on a “gamble.”