From time to time someone experiments with eating by SB rules, but also counting points for portion control. I've done that for the past 8 days and was surprised to find that my points on SB are considerably under my WW allowance. I have 37 points (39 when I restarted) and average 22 to 28 points when eating SB (and am completely satisfied, never hungry.)
I've been losing steadily; I know it's early days.
This isn't proof of anything, of course, just one woman's experience. But I had been eating low point meals, being hungry, adding such things as whole grain English muffins with jam, or sugary yogurt, and stay within points, but not feel satisfied and not lose well. It's interesting.