Transistors were added from what I have read on the various Kyro 1 v. Kyro 2 pages. S3TC has been added in hardware on the Kyro 2. With a die shrink it becomes possible to add transistors (lengthening pipelines) and up the core frequency.
There is nothing wrong with a refresh product. I didn't say that there was. With all the criticism, fairly or unfairly leveled on the Kyro 2 for being a refresh product, I just wanted to make the point that Kyro 3 was not a mere refresh product at all, but a departure from the old architecture.