Not to sure mate. I would say they are the same. I have a 2010 single cab. Check out my tray. I did that my self.
Let me know if I can help you with anything else.
Mine is 1800 wide x 2400 long
Build the basic tray and fab up the mounts once you get your ute. A lot less room for error then.
Let me know if you want any measurements. As you will have 8 chassis mounts. All of my mounts were individually cut as they weren't all the same height.
Thanks
Mitchy