I know exactly what you are talking about. The C43 is fun but more comfortable than Sporty. On longer drives and town to town it is a lot of fun. In the city however I sometimes misses that sharpness not only from the chassis but also from the engine. The Turbo lack is sometimes there - in example if you are in town and drive through the neighborhood where you have to slow down on every street to the right. You let the car roll then accelerate again - that moment the car always have a second delay which kind of sucks. I installed a pedal optimizer which gives it a bit more sharpness in those moments. However - the Chassis is like it is. 

Stay off that 240ix - it will be the same like the C43/63. It is also not a Mini. The Mini is super fun because of its "Knackigkeit" - you cant find that in another compact car.