It is better, by how much? Depends on what you're doing with it. Gaming, it wont be better. Heavily threaded productivity work like media encoding, CAD design and video editing, quite a bit. But when you're talking LGA2011 CPUs, you're getting into industrial strength, and not really worth the cost for the average joe.
The Sandybridge-E CPUs (LGA2011 platform) are amazing if you are able to make use of what they offer. The extra execution cores, PCIe lanes, and memory channels make it a rock solid platform. If money is no object then by all means it is a better CPU. However, the caveat is that they also double as a space heater.