I think sizing up with white and cream pants is almost always a good idea -- they can be so tricky, and if they are the least bit tight, the effect is ruined to my eye. The fit you have going on here is just perfect.
I think I'm still holding at a 10" waist-hip difference even with my current size (my weight gain seems to be fairly distributed all over, but I notice more difference in bra strap tightness than waistband tightness -- menopause is weird, LOL). So it's really good to know what pants are cut for this kind of proportion, especially if the legs are cut with some ease, which I need.