Having been rich, well sort of, and poor, £6 left on a monday. I can tell you rich is better.
BUT, having money just changes the focus of your worries. Personal relationships, commitments and your lifestyle become centre stage as does worries about maintaining your lifestyle, ie how to get even more money to secure your future. It doesn't make you happier unless it helps you achieve your ambitions, such as paying for flight training. Once you have achieved your ambition you can find yourself unsatisfied.
A well paid job that takes you away from your family a lot or puts you under more pressure than you want is not preferable to a less well paid job that leaves you with a potentially satisfying personal life.
When you're poor, money becomes the constant object of your attention, nothing else matters. You have to think in the now. When you find yourself with a fiver to last the rest of the week, as I did on numerous occasions you can't afford, literally and figuratively to think of anything but survival. Happiness is not an option.
At the end of the day, your lifestyle is most important if you have sufficent money to maintain it.