Not all 'VPS' are equal: the underlying virtualization decides isolation and performance predictability.

KVM is full virtualization — each instance has its own kernel, can load custom kernel modules, run Docker and do nested virtualization, with instances isolated from one another (when not oversold) for stable, controllable performance.

Containers / OpenVZ share the host kernel for higher density and lower cost, but with weaker isolation, noticeable noisy-neighbor effects, and no custom kernels — limiting workloads that need specific kernel versions or modules.

For production databases, enterprise apps and Docker/K8s scenarios, KVM's dedicated resources and hardware-level isolation are the safer bet. MOFAN runs KVM across the board, paired with NVMe and BGP-optimized routing for both speed and stability.