The T6 has two official tailgate bikeracks.
1. 'Quasimodo' bike rack - the original T6 released bikerack with no outer frame, and features 4 simply bike rails, akin to building scaffolding (personally, I really like the style). Not for use on electric tailgates (dont worry, no California has an electric tailgate due to the strength of the piston struts. It has wider wheel bars.
2. 'Kylie' bike rack - a revised T6 version of the T5 Kylie rack, also known as 'Style 2', and operable for electric tailgates aswell. It has narrower wheel bars.
The Quasimodo is easy to steal - I wont share the details of how obviously. There are ways around it however. The Kylie is harder to steal, but still not foolproof.
The kylie also offers the ability to act as a 'drying rack' at campsite due to the frame shape
We went for the latter, as it fits the shape of the Transporter body better.