I test-drove a 200t today. I've owned my mk3 for 9 months now.
The cars could not be further apart in terms of just about everything (bar the '200' part).
I have to say, I absolutely loved the 200t. Those who have commented on the 'box without actually trying it need to give it a go before being so judgemental. I will admit, I went into the test drive with the wrong attitude. I came out wanting to buy it, which is a probability (I still have a fiesta ST to try, although I'm sick of seeing them to be fair, they're so common).
Car in question was Liquid Yellow with the cup pack and black 18's. Had a very good drive (shout out to Renault Maidstone and the salesman, who's name escapes me. He was fantastic). The extra torque is extremely noticeable and makes the car far more driveable around town / pottering around. The cabin is nicer and the ride is smoother, but can be changed with the press of a button....something you can't do in a mk3. Granted, if I were on a track, I'd pick the mk3, but I don't live on a track. The sound effect function was a good gimmick and you can turn it off. I actually liked the standard sound. Launch control put a huge smile on my face. Ok, its no GT-R, but then it doesn't cost 70k.