
Are the following mentions coreferent?:
<m> unveils </m> in Apple unveils cheaper Ivy Bridge - powered MacBook Air June 12, 2012 Apple has chosen WWDC week to announce an update to its MacBook Air line. It may lack the Retina display of its newly upgraded, headline - grabbing cousin, the MacBook Pro, but the 2012 Air sees significant advances too. An upgrade from Sandy Bridge to Ivy Bridge processors with improved integrated graphics is chief among the upgrades, and onboard memory has also received a boost. 
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<m> unveils </m> in Apple unveils new MacBook Pro with Ivy Bridge at WWDC June 12th, 2012. Apple is certainly making WWDC a hardware conference this year - it just unveiled a refresh of the existing MacBook Pro running Intel's newer Ivy Bridge processors on the San Francisco gathering's opening day. 