What is the difference between Mana and Decentraland?

Could you please elaborate on the key distinctions between Mana and Decentraland? I'm particularly interested in understanding their respective functionalities, applications, and the roles they play in the broader cryptocurrency and blockchain ecosystem. Could you also discuss any potential advantages or disadvantages of investing in either of these assets? I'm trying to gain a deeper understanding of these two projects and how they might fit into my investment portfolio. Thank you for your insights.