VM's with incorrect OS configured

Are there any supporting vmware documents or evidence that show if you select the wrong OS per VM, that it can affect the performance of that machine? or is this a myth as well?
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pma111Asked:
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rindiCommented:
I don't think there is really any need for documents. The point of selecting the correct OS during the creation of the VM is that the optimal default settings are selected for that guest OS. Otherwise you'll just have to manually adjust the settings for optimal performance which means more work for the person setting it up.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You should really match the OS selection, as close as possible to the VM being installed.
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pma111Author Commented:
In your view hancocka, whats the risk if you dont, if any?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
There is little risk.

BUT Good Practice is to make sure it's the same or similar.
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rindiCommented:
The virtual hardware allocated to the VM's are different depending on the OS you select. For example if you are going to install XP as a VM, the normal selection will be a virtual IDE controller for the disk. This makes the isntallation easy as you don't need drivers for the controller during the installation process. If you select Windows 7 as guest OS, it'll use a SCSI controller.
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