I have test driven, both the EV4 and Countryman E sport. I had the Countryman for 24 hours, I found the seats really uncomfortable and the ride of the car to be very twitchy, both myself and the wife felt we were bouncing around. It could have been the 19” wheels and the firm setup!
The EV4 on the other hand was by far the smoothest and most comfortable ride, I have experienced in an EV.