I find that my Mk4 EX Jazz rides better than my previous Mk3.
Not really sure why, although its the first Jazz I've had, NOT running on Dunlop tyres.
This time I'm on Yokohama Bluearth tyres, maybe that the difference, I just don't know.
Anyway, I'm quite happy with the ride and with car generally, now I've figured out how to turn off all the 'gizmos', which were a real PITA and in my opinion quite dangerous in some situations, as described in other recent posts.