The Slim Shady EP was when Eminem had first figured out how he wanted to sound on the record and how he wanted to sound as an artist, and it is also the introduction of - Slim Shady. It got him signed to Aftermath, so it's pretty much an untouchable album, if you're an Em fan.
So many classics: Low, Down, Dirty, No One's Iller, Murder Murder, JDGAF, '97 Bonnie and Clyde,...
However, I rather listen to the songs on the Slim Shady LP than the EP (except for JDGAF, the 1997 version is SO much iller)
Whereas Infinite is a lot of.. well, nonsense. He hadn't really figured out what his style was going to be and he did a lot of the tracks just for them to be heard on the radio and basically for him to be heard.
Tonite, for example, is just rubbish.
However, most of the rhyming is immensly good and tracks like It's OK (best track on the album), Infinite (rhyming is like
, even though the song itself is somehow senseless), his 313 verse (some of the very best Eminem punchlines here!) and Never 2 Far (extremely smooth flow) are classics too.
I love both albums and I couldn't chose one, but the Slim Shady EP is definitely the more "important" ablum; and it is better.