imported esxi vm slower than created one with CPU "Host"

Hey,

I'm importing VMs from ESXI to Proxmox. For the imported VMs, if i select "host" for CPU they are slower than VMs created in Proxmox. Most notable impact is on speedtests. Both VMs have 4 cores, 4gb RAM, Windows 2022. The imported VMs get half the speed results from the same test server.

If i change the cpu type to AMD Genoa (the host is a AMD Epyc 9454) on the imported VM, i get the same performance as the proxmox created VM with CPU "Host"

Is this because the original VM was...

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