Hello, I would like to buy a second car (Cabrio). Should a 911 991.1 or tend rather to the 991.2 GTS in Black Met. Demonstration or used car but no longer like 40.000km What are the main differences 991.1 or .2 ? What do you think of GTS ? What do I have to pay attention to with the model ? Special diseases ? Resale ? What equipment is a must ? Alcantara or leather seats ? Why do so few have the comfort train (keyless engine start) ? Would me over all tips and Tricks are happy. Lg Chris