Is there a notable difference between the Linksys RE1000 and RE2000?

I currently own a Linksys EA4500 (N900) and am looking to boost the signal. I heard Linksys is the way to go, but is it worth the extra $20 to get the RE2000 over the RE1000? I live in a three story house and the router is currently in the basement. Only devices that use internet are the PS3, LG Blu-Ray Player, and some apple devices (macbooks, iphones, iPads, etc.)… Nothing fancy.

The difference is 1000