C with comfort seats away and SLK here?

Hello to the round, I’m about to make a difficult decision for my next ‘toy’. My C 220 CDI has now reached its 100000 and fits me so well, also has comfort seats and I commute 120 km daily with it. But since now about 2-3 years my friend and I move around at a SLK. First he wanted to drive a SLK and told me 3 years ago I should not take a C, but a SLK as a daily driver, parallel to that he has a C class with AHK. Now, 3 years later, the thought of a roadster is very itchy. And I seriously think about changing my C against the SLK 250CDI with optional equipment. First, that would be something quite different, but second, I have sports seats. My friend then buys another C of the 205 series with comfort snaps. A lordose support can be bought and that doesn’t even look terrible. Otherwise, the question: Would you change?