Also drove the CL2 luxury.

18" michelin are a nice improvement from the 17" potenza's and the road noise was much improved on the previous model.

Fabric on the standard Euro is worse than the old model, looks and feels cheaper but according to the dealer is harder wearing.
Memory function is an appreciated add-on on the luxury as are the parking sensors.

Rear-leg room is no better than the old car and still cramped at the knees. Okay for children but not for long drives or tall adults. Front room is improved with wider seats and plenty of leg-room. The Civic-like steering wheel is light and responsive but I am used to (and prefer) the old Euro.
Don't like the buttons, ergonomics of the steering wheel buttons and the dash / dials. It looks too cluttered.

Boot is horrible. I can forgive a space-saver with 18" rims. But it is uneven and looks smaller and less usable than the old Euro which is unforgivable in a larger car.

MP3 inputs and CD-deck are appreciated and it should have been included in the old Euro's years ago! Glove-box vents are a gimmick and keeps things nether cool nor hot enough to be of much use.

Driving: Suspension slightly more compliant and more refined. Less jarred and stiff over bumps and definitely a smoother ride although still well tuned and balanced for fast cornering. Power feels less than the old-model and it reminded me more of the American Accord than the old-CL9 Euro. The touted 10 speaker stereo sounded nice but wasn't exceptional. Fit and finish is worse than the old CL9 and I spotted several interior trim panels that didn't line up.

Braking was inferior to the old model - less grip and bite and the front nose dived when I stepped hard on the brake.

It's a good drive and good value for money. But apart from the cosmetic changes and small amenity improvements (e.g. MP3, heated vents, memory seats) IMHO not worth upgrading the old model for.