CPU-Z Benchmarks on various Synology models - Hope this helps give a rough idea of the CPU power difference between models. Also included 2 other VMs running on Windows Hyper-V Server. :
Intel Xeon E3-1240 V6 Linux Benchmarks and Review: Our first Kaby Lake Xeon E3 CPU
CFP2006 Result: NEC Corporation Express5800/T110h (Intel Xeon E3-1220 v5)
Intel Xeon E3-1220 Sandy Bridge Benchmarks and Review
Intel Xeon E3-1220 Sandy Bridge Benchmarks and Review
Intel Xeon E3-1220v5@3Ghz/3.5Ghz(Turbo) 4C/4T @80 Watt | Precomp - Server Store
Benchmark of Tensorflow using CPU and 3 different GPUs | by Ashar A. | Medium