`Mark On HiFi` is a youtuber who has spent a lot of time with three Dynaudios, the C1, Heritage Special, and the Special 40. He has videos comparing them. The C1 were were long term speakers, he tried the 40s, and ended up Heritage Special.
I enjoy his take and it’s an enjoyable watch for me:
Heritage Special vs C1: https://youtu.be/nQWMHUGDqEI
Dynaudio C1 vs Special 40: https://youtu.be/y7SIjixTsMA
Deciding on the Heritage Special: https://youtu.be/ZV56xgUqIhA