I've never heard of Zorin, except that he was the villain in one of the James Bond 007 movies.
But I've found that different distros can be either really easy. Two clicks and enter password with Ubuntu and Linux Mint for VMware Tools and VirtualBox Additions. Or on the other hand Red Flag Linux* can be a wrestling match and really frustrating to make it properly supported in a virtual machine environment....I gave up in the end. It seemed to be mostly dependency problems....(dependency hell).
Presumably VMware and Oracle only really develope and test their virtual PC environments with
most popular mainstream distros, like Ubuntu, Fedora, etc. And not things like Zorin or Red Flag.
*
Red Flag Software Co.,Ltd ...it's Chinese and I don't really recommend it.