Its interesting that you've been down voted. I'm not suggesting that you are correct or wrong, but I'd geniunely like to hear a philosopher or somesuch clever thinker talk at length on this topic - are they the same? are they different? is the ability to get through a difficult physical experience such as pain related to being able to work at a task you show no interest in for hours? Is it a single trait that you either have or don't, or do some people have remarkable discipline when it comes to office work and others are disciplined when it comes to gardening or cooking for hours with passion all day every day? Is it something that is geniunely in a person's character, or is it to do with other things (do people with discpline just get more sleep/have a better upbringing/have interesting work to do etc?)

I don't want to pass any judgement nor assume the answers to any of these questions - I'd like to see/hear/read discussion on it.