Yup there's two books. I've used them both. The old one (non K&B) covers a lot of stuff NOT on the current 1.4 exam such as
java,io and java.awt.
K&B's sample exam questions at the end of each chapter are WAAAAAAAAAY better.
The titles show the difference (035 vs 025). Here's how Amazon.com lists them:
Sun Certified Programmer for Java 2 Study Guide (Exam 310-025)
by Inc Syngress Media
Sun Certified Programmer & Developer for Java 2 Study Guide (Exam 310-035 & 310-027)
by Kathy Sierra