Difference between easefit and easefit plus?

For the iphone 5 they've got the armbands for running. There's the Belkin easefit armband and there's also an easefit plus. For the love of god someone tell me what's so special about the plus. What's the difference between the 2? I've been searching online and asking at stores and no one can tell me.

Users with bigger biceps have the option of spending $10 more on Ease-Fit Armband Plus ($30, not reviewed), which is designed for arms 12.6" to 15.8", and also includes a key pouch. So while the price, materials, and build of the basic Ease-Fit Armband are attractive, the strap will limit its utility; users with small to medium-sized arms will have no problem, but it will be tight for muscular male arms.