Question about lyrics that includes eminem

[slim sherif]

There is a song by mike shinoda I think is called "Tupac and Biggie tribute" and there is a line there where he mentions eminem and 50 that I want someone to explain, the line is like this:
i cant believe these rappers try to bite yo style even em and 50 and 8 mile.
Is he saying that em and 50 tried to copyTupac's style or what?, I'm confused because I read in many sites before that mike likes eminem, so why would he say something like that?

[slim sherif]

i've never heard of this song by shinoda, and i'm doubting whether it really exists. upload it or somethin, cuz i'm thinking it was probably some other person, not mike shinoda.

I put it in the dl center here:
viewtopic.php?f=13&t=36068