Hi,
The difference in render output may be due to
Overwrite kernel settings being enabled in your Render Settings.
This option allows you to use different kernel settings for your renders, that overwrite the kernel settings for the Live Viewer.
To change the
Overwrite kernel settings option, follow the steps shown below:
(You will want to ensure that the Enable check-box is not ticked, as shown in step 4 in the second image)