I would suggest checking what the standard options are on the GTS in Europe. At least in Canada, the GTS comes with heated front seats and the steering wheel also comes with the heated function. As such, paying for the heated steering wheel option only gets you an upgrade to the GTS sport wheel and so really it's really only a style preference. The heated seat option gets you heated seats in the rear. I had a chance to sit in the 18-way sport seats at my dealership prior to COVID. Ultimately I decided to go with the 8-way seats since they had the exact same sport design and just lacked some points of adjustability that I didn't need. It's worth noting that if you want seat ventilation, you need to go with either the 14- or 18-way seats (at least in Canada, which I think is the same as the US model).