Difference between Platinum and Diamond

Hello everyone. I’m in a Platinum team, and we are wanting to push for promotion to the diamond league. We’ve just recently come up from Gold to Platinum and we noticed that this league is a step up from Gold, in terms of the size of the club quests and the amount needed to stay here. None of us has been in the Diamond league before, so I was wondering if someone could give ua an insight into what the step up is like. Are the Club Quests bigger? How many CP do we need, weekly, to stay above relegation? Are there any other differences? I look forwards to hearing your replies so I can relay it back to the team, so we can make an informed decision about pushing for promotion. Thank You