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 E5-2690 v2 | Processor Benchmarks | PC Builds
Dual Intel Xeon E5-2697 V4 Benchmarks - #3 in the lineup
Intel Xeon E5-2690 V2 Photoshop CC 2019 Benchmark - CPUAgent
Lenovo ThinkStation P Series application performance figures with new Haswell Xeon E5 v3 CPUs - DEVELOP3D