You can resolve this for yourself experimentally. Or just look at the math (pulled from google's nutrition facts):

Eat two cups of cooked white rice, ~412 calories, 316 g.

A day later with the same starting conditions, eat 316 g of butter, or ~2,265 calories. I bet you're going to feel way more full after eating the same "amount" of butter vs rice.

As for 500 calories of rice vs 500 calories of butter, hopefully someone else can chime in with references, but again, do the experiment for yourself: how soon after eating an entire meal of rice vs butter do you find yourself getting hungry? This is complicated by what kind of macro ratios a given person's gut is used to, but generally, I find myself ready for more after the rice much sooner.