There is no "correct" rendering of a raw file - like a film negative, it's open to interpretation.
Capture One and Lightroom just have different default renderings, and if you prefer Capture One's rendering, you can create a develop preset in LR that is closer to CO's rendering, and you can apply it on import.
Or you can try the different Camera profiles under the Camera calibration panel in Develop, and if you find one you like, you can set it as default.
As for the LR rendering being more grainy - this is probably caused by CO applying noise reduction - LR does not apply this by default.
So LR is showing you the "true" noise of the image.
But sharpening settings could also have an effect on this.
Thank you for your response. It is strange .... when i open the raw file in Adobe Photoshop it is very close to Capture One 9? You would think that the 2 Adobe programs would at be similar? I have tried the same file in Aperture and Exposure X.... done of them have the grain feel to the file.
I really want to move to Lightroom as the overall package is fantastic (other than the user interface feeling very dated) but i have to do so much work to the files just to get them to a place where the other programs begin. Thank you all the same for your response.
If the image does not display identically in Lightroom and Photoshop, you probably have a defective monitor profile.
As a troubleshooting step, and possibly a temporary fix, try setting the monitor profile to sRGB.
If this fixes the problem, calibrate your monitor with a hardware calibrator, which will create a new, sound profile.
Another troubleshooting step (that you could try first) is to disable the graphics processor in Lightroom.
Lightroom > Preferences > Performance.
Thank you! 100% correct. I was using a calibrated profile setting but it was adding grain to the lightroom version.... strange not to be the same across the board. I have swapped to sRGB. Would i be better to use ProPhotoRGB? Massive Thanks for helping.
sRGB works because most monitors display colors close to the sRGB gamut.
If you have a wide gamut monitor, you could use Adobe RGB, but these monitors are not common with Mac users.
Don't ever use ProPhoto.
To get an accurate profile, you should calibrate your monitor with a hardware calibrator. (Spyder, ColorMunki, etc.)
Thank you so much Per. I will re calibrate and keep a closer eye on it. Kind regards Ollie