
Are the following mentions coreferent?:
<m> make </m> in Matt Smith, 26, will make his debut in 2010, replacing David Tennant, who leaves at the end of this year. He is the youngest actor to play the part. He has previously appeared on TV, in films and the theatre and is best known for appearing in the BBC's The Ruby in the Smoke. 
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<m> become </m> in Peter Capaldi is the bookies' favourite to become the next Doctor Who. There has been a surge in bets on Capaldi, who plays sweary spin doctor Malcom Tucker in The Thick of It, replacing Matt Smith. He now has odds of 2 / 1 to become the 12th Time Lord above Ben Daniels and Rory Kinnear. 