So if you use a wrong identifer, 2 issue can be appears :
1 - If you choose typical installation and not custom , VMware will apply all recommanded hardware and configuration from the Vendor. So basically, the scsi controller will be maybe different, and during your installation process, the Windows Installers will not see the hard drive.
2 - If your installation was without failure and your OS is currently running, when you will be able to install the vmware tools, your ESX will present the wrong vmware tools setup.
But if you have already do that, you can change after the identifer. :vSphere Documentation Center
Regards,
Julien