Virtualization guest reports: kvm VS microsoft

HI guys. How guest reports *Virtualization* with /hostnameclt /should not depend on the guest itself, right?   Virtualization: microsoft vs   Virtualization: kvm particularly if guests run off the same host with libvirtd v. 11.9.0 Is it somewhere in domain's xml - but if so I failed to spot what makes this difference - what is it? thanks, L.