Next 3 games:
Cristiano will face Liverpool twice and then Basel away. Messi will face Ajax twice and then APOEL away.
Cristiano is definetely in much better form and has a 1 goal advantage, but Messi will have it significantly easier to score.
I think it's likely that Messi will tie with Raúl first, but then Crisitano will surpass them both... the last week of the group stage will have Messi playing home against PSG and Cristiano playing home against Ludogorets.