Hi Marc
Looks good to me, I can't see any issues with focus.
I think you are always at the mercy of the seeing conditions for these high resolution images and animations.
I think there are fewer distinct features on Saturn, so rotational movement is more challenging to perceive, even though it is similar to that of Jupiter, some 9 or 10 hours.
Great shots, I'd be very happy with those results.
Cheers
Dennis