well, just take an extra teaspoon or something then.
it could also be that g 'n n has less fat? maybe thats why you arent feeling as full on this one.
also, i suggest you dont take them by the tablespoon/volume but by weight, as the volume can vary from brand to brand, so you might be getting less now compared to when you were taking fearn.
i grind them up into a powder in the coffee grinder and either eat them as is or sprinkled on eggs, salad, chicken or whatever. love their taste. i also take them with my fish oil and fatty supps like ps, tocomin vitamin e, tudca etc for enhancing absorption.