The Mercedes w123 coupe is just way cooler that this Cadillac, no explanation needed for those who have got eyes to see.
Mercedes, and this model type in particular are worldwide reknown to be the top of quality, so much so that they sell all over the Globe, while cadillacs only sell in the US, if they do at all!
Merc's bomb-proof construction quality needs no introduction.
While the Cadillac has more horse power that is only marginal, and taking into account the size of the engines, 4.1 for the Cadillac and 2.3 for the Merc, the ratio between engine size and hp is actually nearly two-to-one in favour of the Merc.
The 2.3 litre engine, with 109hp is a rather parsimonious power house, yet strong enouhg to pull the car to reasonable speeds even in modern day traffic.
The Merc is perfectly sized to accomodate 4 passengers and has got quite a bit of luggage space without being cumbersome to drive around or park.
The Mercedes W123 is a testament to utmost quality. It is an icon of the 20th century automobile history, and perhaps the most recognisable of all Mercs.
While de De Ville has clearly aged wit time and has little importance in automobile history
Mercedes is, we can say, the cradle of the Automobile history. Always at the very top for 130 years combining quality, style, performance, reliability, motorsport awards, relenteless innovations.
We can say none of that regarding Cadillac