Not really comparable after paying for CoE for open category 152K SGD (US$104K), in Singapore there is a advanced registration fee called ARF,then there is additional tax on top. So a typical BMW X5 will be around SGD 540,000 (US$ 394,600) and that too for 10 years, after 10 years need to buy a new CoE or discard the car.

A Tesla Model S will be more than 400k for 10 years after that need another 100k for 10 year renewal.

Also fuel prices and road tax are high in Singapore which needs to be paid regularly besides buying costs.

It looks like they pay a VAT, plus a greenhouse tax. But the greenhouse tax seems relatively small, equivalent to around $100 USD—though there are many factors that would change that number a little bit. The VAT is much higher, something like 25% of the vehicle price. But I would not consider VAT a tax on car ownership, per se, since it is applied to many other goods, and we would not consider a VAT levied on, say, a microwave to be a tax on microwave ownership.

No, the citizens working for international organisations like CERN and WTO buy the cars without taxes instead, as per countries agreements with said organisations.

The 'fees' are primarily in the form of high taxes on new gasoline cars, and especially high taxes on new cars with large/powerful engines. If you want, say a BMW M3 with the biggest and most powerful engine, then you're probably paying a $76k premium compared to the US. If you want to buy a small 30 year old piece of crap then the additional taxes aren't anywhere near that high.

Fairly comparable? Not even close

Fees to own cars vs. fees to own gasoline cars, I'm sensing there's an important difference here.