Before diving into the benefits, let’s decode the string.

Legacy FortiGate VMs on KVM often required manual tweaking of XML configurations, NIC model types (e.g., switching from rtl8139 to virtio), and CPU pinning to get decent throughput. The newer build generations referenced by filenames like the one above aim to solve these "out-of-the-box" friction points.

The "build 1010" (or similar iteration numbers) represents patches and fixes accumulated over previous versions.

Historically, older FortiGate VM builds were popular because they were easier to use with limited trial licenses or older perpetual licenses that are no longer sold.