Palm Pre is .19 of an inch thicker than the iphone, and over half an inch shorter. Great size for an average hand or a pocket. Here are the numbers:
pre 3.96” by 2.34” by 0.67”; 4.76 oz. iPhone 4.3″ by 2.4″by 0.33″; 4.05 oz.
At least one of the articles is incorrect.