The '07 has a better turning circle than the 1st generation ST. I find the handling alot better. Just keep in mind that it is a little wider and longer.
I again do not notice a differance between my 2007 and 2001 ST. Like JohnnyB said the 2007 is wider and longer than the 1st Gen ST's. Acording to the book the 2001 ST has a 43.1' turning radius and the 2007 ST has a 41' turning radius. Also the PT cruiser has a 37.9' turning radius.
I think the 07 turns better than my old 02 ST. I can actually pull into parking places without taking wide swings and backing up once. I hated that. The front tires seem to turn more so you can fit in tighter spaces easier.