what's the difference between "想“ and "要” when both can be translated into "want to"?

"想“ is related to mental activity.
for example, 我想有很多钱。I want to have a lot of money. It's something I'm thinking of.
"要” is related to action that is supposed to happen.
when ordering food, we usually use "要“ instead of "想”
for example, 我要一杯咖啡。