我的度假村（例如莫纳山或大湾）的移动数据 (eSIM) 比 Wi-Fi 更可靠吗？

Yes, 100%. Wi-Fi in most luxury resorts in Mauritius is famously slow, congested, and only works in the lobby. A personal eSIM gives you a private, fast 4G/LTE connection that works everywhere, in your room, by the pool, and, most importantly, on the beach (like Flic-en-Flac), where hotel Wi-Fi never reaches.