Both SATA SSD and NVMe storage use solid-state media, but NVMe is designed to communicate over PCIe with much higher parallelism and lower protocol overhead. That can reduce latency for database-heavy and I/O-intensive applications.
What to consider
The improvement is most noticeable when storage operations are a real bottleneck. A slow application caused by inefficient code, insufficient memory or external APIs will not become fast simply because the server uses NVMe drives.
When comparing hosting plans, consider NVMe as one part of the performance stack alongside CPU, memory, caching, web-server configuration, database tuning and network quality.