What is the difference between maybe next week would be better and maybe next week will be better and that's it ?Feel free to just provide example sentences.

"Maybe next week would be better": This gives the feeling that you are discussing a better time for an event or an appointment. Better=more convenient. "If I meet you for lunch this Wednesday as we'd planned, I'll have to leave early for work. Instead of meeting for lunch this week, maybe next week would be better."

"Maybe next week will be better": This gives the feeling that you are discussing your hope or wish that next week (future week) will be an improvement compared to this week (current week). Better=improvement; less bad. The implication is that this current week has been bad or difficult in some way, so you hope next week will be more enjoyable. "This week my pet goldfish died, I spilled ink on my favorite shirt, and I had to walk home in the rain. Maybe next week will be better."