Actually it would be partially a function of the height of of the submarine. What's periscope depth on that 688 SSN? I'll bet it's a lot taller than the fleet boat. The mechanical advantage difference set up over the longer distance between keel and top of the sail might make the 688 actually move more at the same depth than a fleet boat would. And the greater area of the sail, plus the round cross section of the body giving the boat little inherent roll stability would accentuate the motion.
I'll bet the modern boats have more but gentler motion, while the fleet boats would have a shorter but snappier motion in a big storm at 200'. It would be interesting to know from someone who has experienced both.
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