"The 1.5GHz processor (we're led to believe it's a TI OMAP 4460) does make a difference, although it's normally what you might call an improvement by a thousand cuts over the original 1GHz chip. RIM's interface is just a little bit more fluid, apps are ready just a little bit sooner, games like Need For Speed: Undercover are just a bit faster. Where we noticed the clock speed hike is in browsing -- and by a wide margin. Running the SunSpider web browser benchmark, we saw the JavaScript processing time cut by 35 percent versus the WiFi version to
1,397ms (PlayBook 4G), making it faster not just than the WiFi PlayBook but the iPad, the Nexus 7, the Galaxy Tab 2 7.0 and even the quad-core Galaxy S III smartphone. Our personal experience also showed that the browser didn't have much trouble keeping up with complex pages. We're not sure what RIM slipped into the PlayBook 4G LTE's diet to make its browsing so quick, but we'd like to try some."