Selecting VM for backup.. select manually vs select automatically

I have a list of 7 VMs that I need to backup. Is there a recommended way to add these VMs ?

eg a VM named Test.. is there any difference if i select it manually as opposed to performing an query using the display name as test. 

For this case just assume that there wont be any more VMs added to this envt.. hence no other VM having display name as test88 etc.. 

Thanks