I think the TAs rode just a tad softer (nothing significant), and I'm sure they would ultimately corner better at high speed, but my days of really pushing the Camaro's limits are behind me.
Now, I absolutely love the Polyglas tires. They look awesome, handle very well, and they seem to grip like crazy in the rear. I do have my alignment set up per factory specs for bias ply tires, so maybe that helps. Also, I run the correct tire pressure for these tires (IIRC it is 24 psi cold). I initially had them at 30 and they were very stiff. I was apprehensive about the Polyglas tires at first, but I seem to notice none of the 'bad' things that some people say about them. Most of my driving is on twisty/turny back roads (sometimes at a pretty good clip), and I've never heard a peep from the tires.
If you can get over the price, give them a try.