Is XMR the same as Monero?

Could you clarify for me, is XMR interchangeable with Monero, or are they distinct cryptocurrencies? I've heard some people use them interchangeably, but I'm not entirely sure if they're one and the same. If they're not, could you please elaborate on the differences between them? Also, could you provide some insight into the popularity and acceptance of each within the cryptocurrency community? It would be helpful to understand their respective roles in the market. Thank you for your assistance in clarifying this matter.