They have both been charged with the murder of 14-year-old Paul and the attempted murder and grievous bodily harm (GBH) of another boy, a friend of Paul's, aged 15.
Two other boys, aged 13 and 14, were charged with the same offences earlier this week and have been remanded in custody to appear at the Old Bailey on April 24th.
Three other male teenagers, aged 14, 15 and 19, have been released on police bail to return in June pending further enquiries.
Paul was stabbed to death outside his Leytonstone home in east London last Friday night.
His friend was also stabbed and taken to hospital where he remains in a stable condition, police say.
Easter services paused in memory of Paul while the teenager's MySpace music page, which he maintained under the name Hellrazor, has been inundated with messages of condolence from friends.
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